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Jonneke J Hollanders Department of Pediatric Endocrinology, VU University Medical Center, Amsterdam, The Netherlands

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Bibian van der Voorn Department of Pediatric Endocrinology, VU University Medical Center, Amsterdam, The Netherlands

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Noera Kieviet Department of Pediatrics, Psychiatry Obstetrics Pediatrics Expert Center, OLVG West, Amsterdam, The Netherlands

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Koert M Dolman Department of Pediatrics, Psychiatry Obstetrics Pediatrics Expert Center, OLVG West, Amsterdam, The Netherlands

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Yolanda B de Rijke Department of Clinical Chemistry, Erasmus MC, University Medical Center, Rotterdam, The Netherlands

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Erica L T van den Akker Department of Pediatric Endocrinology, Erasmus MC Sophia Children’s Hospital, Rotterdam, The Netherlands

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Joost Rotteveel Department of Pediatric Endocrinology, VU University Medical Center, Amsterdam, The Netherlands

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Adriaan Honig Department of Pediatrics, Psychiatry Obstetrics Pediatrics Expert Center, OLVG West, Amsterdam, The Netherlands
Department of Psychiatry, VU University Medical Center, Amsterdam, The Netherlands

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Martijn J J Finken Department of Pediatric Endocrinology, VU University Medical Center, Amsterdam, The Netherlands

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of the circadian rhythm. The hair GC concentrations reflect the exposure in the time frame during which the hair grows ( 14 ). Maternal hair GC levels seem to reflect HPA axis activity during pregnancy ( 15 , 16 , 17 ). Neonatal hair GC levels

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Juliane Léger Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service d’Endocrinologie Diabétologie Pédiatrique, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France
Université Paris Diderot, Sorbonne Paris Cité, Paris, France
Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 1141, DHU PROTECT, Paris, France

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Anne Fjellestad-Paulsen Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service d’Endocrinologie Diabétologie Pédiatrique, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France

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Anne Bargiacchi Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service de Psychiatrie de l’Enfant et de l’Adolescent, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France

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Catherine Doyen Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service de Psychiatrie de l’Enfant et de l’Adolescent, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France

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Emmanuel Ecosse Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service d’Endocrinologie Diabétologie Pédiatrique, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France

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Jean-Claude Carel Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service d’Endocrinologie Diabétologie Pédiatrique, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France
Université Paris Diderot, Sorbonne Paris Cité, Paris, France
Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 1141, DHU PROTECT, Paris, France

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Marie-France Le Heuzey Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, Service de Psychiatrie de l’Enfant et de l’Adolescent, Centre de Référence des Maladies Endocriniennes de la Croissance et du développement, Paris, France

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effective treatment to improve HV in these patients. Nutritionally acquired resistance to GH, with high levels of this hormone and a disruption of the circadian dynamics of GH secretion ( 12 , 13 ), high levels of the GH secretagogue ghrelin ( 14 ) and

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I Azzam Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel

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S Gilad Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel

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R Limor Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel

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N Stern Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel

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Y Greenman Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel

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between circadian variation of ghrelin and cortisol serum levels when studied in the basal, non-fasted state ( 40 ), whereas a strong inverse correlation emerged after prolonged fasting ( 41 ). Furthermore, ghrelin and cortisol serum concentrations were

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Lisa Arnetz Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes
Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes

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Neda Rajamand Ekberg Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes
Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes

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Kerstin Brismar Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes
Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes

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Michael Alvarsson Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes
Departments of Endocrinology, Molecular Medicine and Surgery, Metabolism and Diabetes

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mellitus . Progress in Clinical and Biological Research 227A 1987 467 – 482 . 7 Kok P Kok SW Buijs MM Westenberg JJM Roelfsema F Frolich M Stokkel MPM Meinders AE Pijl H . Enhanced circadian ACTH release in obese premenopausal women

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Heike Hoyer-Kuhn Department of Paediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany

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Angela Huebner Department of Paediatrics, University Children’s Hospital Dresden, Dresden, Germany

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Anette Richter-Unruh University Children’s Hospital Bochum, Bochum, Nordrhein-Westfalen, Germany

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Markus Bettendorf University Children’s Hospital Heidelberg, Heidelberg, Germany

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Tilman Rohrer University Children’s Hospital Homburg, Homburg, Germany

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Klaus Kapelari University Children’s Hospital Innsbruck, Innsbruck, Austria

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Stefan Riedl Department of Pediatric, Medical University of Vienna, Vienna, Austria
St.Anna Kinderspital, Medical University of Vienna, Vienna, Austria

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Klaus Mohnike Department of Biometrics, Otto von Guericke Universität Magdeburg, Magdeburg, Sachsen-Anhalt, Germany

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Helmuth-Günther Dörr University Children’s Hospital Erlangen, Erlangen, Germany

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Friedrich-Wilhelm Roehl Department of Biometrics, Otto von Guericke Universität Magdeburg, Magdeburg, Sachsen-Anhalt, Germany

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Katharina Fink Institute of Epidemiology and Medical Biometry, ZIBMT, University of Ulm, Ulm, Germany

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Reinhard W Holl Institute of Epidemiology and Medical Biometry, ZIBMT, University of Ulm, Ulm, Germany

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Joachim Woelfle University Children’s Hospital Erlangen, Erlangen, Germany

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Debono M Mallappa A Gounden V Nella AA Harrison RF Crutchfield CA Backlund PS Soldin SJ Ross RJ Merke DP Hormonal circadian rhythms in patients with congenital adrenal hyperplasia: identifying optimal monitoring times and novel disease

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Hong Jiang Department of Neurosurgery, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
Department of Neurosurgery, Rui-Jin Lu-Wan Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China

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WenJie Yang Department of Radiology, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China

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QingFang Sun Department of Neurosurgery, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
Department of Neurosurgery, Rui-Jin Lu-Wan Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China

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Chang Liu The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Lab for Neuroinformation, Center for Information in Medicine, University of Electronic Science and Technology of China, Chengdu, China
College of Information Technology and Engineering, Chengdu University, Chengdu, China
College of Computer Science, Sichuan Normal University, Chengdu, Sichuan, China

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LiuGuan Bian Department of Neurosurgery, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China

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-h urinary free cortisol (UFC) level, bilateral petrosal sinus sampling, absence of a blunted circadian rhythm of cortisol secretion, and other clinical features ( 18 ). CD remission was confirmed in all remitted CD patients by normal UFC after

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Jintao Hu Department of Neurosurgery, Xinqiao Hospital, The Army Medical University, Chongqing, China

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Qingbo Chen Department of Neurosurgery, Xinqiao Hospital, The Army Medical University, Chongqing, China

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Xiao Ding Department of Neurosurgery, Xinqiao Hospital, The Army Medical University, Chongqing, China

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Xin Zheng Department of Neurosurgery, Xinqiao Hospital, The Army Medical University, Chongqing, China

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Xuefeng Tang Department of Pathology, Xinqiao Hospital, The Army Medical University, Chongqing, China

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Song Li Department of Neurosurgery, Xinqiao Hospital, The Army Medical University, Chongqing, China

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Hui Yang Department of Neurosurgery, Xinqiao Hospital, The Army Medical University, Chongqing, China

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51 – 60 . ( https://doi.org/10.1016/j.expneurol.2016.09.006 ) 19 Lin R Mo Y Zha H Qu Z Xie P Zhu ZJ Xu Y Xiong Y Guan KL . CLOCK acetylates ASS1 to drive circadian rhythm of ureagenesis . Molecular Cell 2017 68 198.e6 – 209

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Marie Reeberg Sass Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Nicolai Jacob Wewer Albrechtsen Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Biochemistry, Rigshospitalet, Copenhagen, Denmark

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Jens Pedersen Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Department of Endocrinology and Nephrology, Nordsjællands University Hospital, Hillerød, Denmark

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Kristine Juul Hare Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Nis Borbye-Lorenzen Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Center for Neonatal Screening, Department of Congenital Disorders, Statens Serum Institute, Copenhagen, Denmark

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Katalin Kiss Department of Pathology, Rigshospitalet, Copenhagen, Denmark

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Tina Vilsbøll Steno Diabetes Center Copenhagen, Gentofte, Denmark
Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark

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Filip Krag Knop Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Steno Diabetes Center Copenhagen, Gentofte, Denmark
Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark

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Steen Seier Poulsen Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Niklas Rye Jørgensen Department of Clinical Biochemistry, Rigshospitalet, Copenhagen, Denmark
Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Jens Juul Holst Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Cathrine Ørskov Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Bolette Hartmann Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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5 425 – 431 . ( https://doi.org/10.1038/nrrheum.2009.139 ) 2 Bjarnason NH Henriksen EE Alexandersen P Christgau S Henriksen DB Christiansen C . Mechanism of circadian variation in bone resorption . Bone 2002 30 307 – 313

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Cheng Han Ng Yong Loo Lin School of Medicine, National University of Singapore, Singapore

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Yip Han Chin Yong Loo Lin School of Medicine, National University of Singapore, Singapore

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Marcus Hon Qin Tan Yong Loo Lin School of Medicine, National University of Singapore, Singapore

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Jun Xuan Ng Yong Loo Lin School of Medicine, National University of Singapore, Singapore

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Samantha Peiling Yang Yong Loo Lin School of Medicine, National University of Singapore, Singapore
Department of Medicine, National University Hospital, Singapore

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Jolene Jiayu Kiew Department of Medicine, National University Hospital, Singapore

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Chin Meng Khoo Yong Loo Lin School of Medicine, National University of Singapore, Singapore
Department of Medicine, National University Hospital, Singapore

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normalization in cinacalcet can be attributed to the physiological properties of PTH. The PTH is subjected to significant variation, affected by circadian, seasonal and pulsatile ultradian secretion ( 51 ). The secretion pattern can be altered in PHPT, with an

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Anastasia Ibba SSD Endocrinologia Pediatrica e Centro Screening Neonatale, Ospedale Pediatrico Microcitemico, ‘A. Cao’, AO Brotzu, Cagliari, Italy

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Francesca Corrias SSD Endocrinologia Pediatrica e Centro Screening Neonatale, Ospedale Pediatrico Microcitemico, ‘A. Cao’, AO Brotzu, Cagliari, Italy

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Chiara Guzzetti SSD Endocrinologia Pediatrica e Centro Screening Neonatale, Ospedale Pediatrico Microcitemico, ‘A. Cao’, AO Brotzu, Cagliari, Italy

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Letizia Casula SSD Endocrinologia Pediatrica e Centro Screening Neonatale, Ospedale Pediatrico Microcitemico, ‘A. Cao’, AO Brotzu, Cagliari, Italy

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Mariacarolina Salerno Dipartimento di Pediatria, Università Federico II, Napoli, Italy

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Natascia di Iorgi Dipartimento di Pediatria, IRCCS Istituto Giannina Gaslini, Università di Genova, Genova, Italy
Dipartimento di Neuroscienze, Riabilitazione, Oftalmologia, Genetica e Scienze Materno-infantili, Università di Genova, Genova, Italy

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Gianluca Tornese SSD Endocrinologia Pediatrica, Clinica Pediatrica, IRCCS Materno-infantile Burlo Garofolo, Trieste, Italy

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Giuseppa Patti Dipartimento di Pediatria, IRCCS Istituto Giannina Gaslini, Università di Genova, Genova, Italy
Dipartimento di Neuroscienze, Riabilitazione, Oftalmologia, Genetica e Scienze Materno-infantili, Università di Genova, Genova, Italy

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Giorgio Radetti Dipartimento di Pediatria, Ospedale Generale Regionale, Bolzano, Italy

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Mohamad Maghnie Dipartimento di Pediatria, IRCCS Istituto Giannina Gaslini, Università di Genova, Genova, Italy
Dipartimento di Neuroscienze, Riabilitazione, Oftalmologia, Genetica e Scienze Materno-infantili, Università di Genova, Genova, Italy

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Marco Cappa UOC di Endocrinologia, Dipartimento Universitario Ospedaliero, Ospedale Pediatrico Bambino Gesù IRCCS, Roma, Italy

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Sandro Loche SSD Endocrinologia Pediatrica e Centro Screening Neonatale, Ospedale Pediatrico Microcitemico, ‘A. Cao’, AO Brotzu, Cagliari, Italy

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synthesis in the liver is stimulated by GH. IGF1 circulates primarily bound to the acid-labile subunit (ALS) and the insulin growth factor binding protein-3 (IGFBP3) ( 4 , 5 , 15 ). IGF1 and IGFBP3 serum levels show little circadian variation, so that a

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