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Dafydd Aled Rees Cardiff University, Cardiff, United Kingdom

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Deborah P Merke National Institutes of Health Clinical Center and the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, USA

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Wiebke Arlt MRC LMS, London, United Kingdom

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Aude Brac De La Perriere Hospices Civils de Lyon - GHE - Endocrinologie, Bron, France

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Angelica Linden Hirschberg Karolinska Institute, Solna, Sweden

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Anders Juul Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark, and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark

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John Newell-Price The University of Sheffield, Sheffield, United Kingdom

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Alessandro Prete University of Birmingham, Birmingham, United Kingdom

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Nicole Reisch Endokrinologie, Nephrologie und weitere Sektionen - Medizinische Klinik und Poliklinik IV - Campus Innenstadt, München, Germany

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Nike M Stikkelbroeck Radboud University Nijmegen, Nijmegen, Netherlands

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Philippe A Touraine University Hospitals Pitié Salpêtrière - Charles Foix, Paris, France

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Alex Lewis Neurocrine Biosciences Inc, London, United Kingdom

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John Porter Neurocrine Biosciences Inc, London, United Kingdom

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Helen Coope Neurocrine Biosciences Inc, London, United Kingdom

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Richard J Ross The University of Sheffield, Sheffield, United Kingdom

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adrenal androgens ( 1 ). To address this, clinicians have used a variety of treatment regimens, including the use of a higher dose of glucocorticoid at night in a reverse circadian treatment pattern. A recent comparison, using a higher dose of

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Carla Scaroni Dipartimento di Medicina, U.O.C. Endocrinologia, Università di Padova, Padova, Italy

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Nora M Albiger Dipartimento di Medicina, U.O.C. Endocrinologia, Università di Padova, Padova, Italy

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Serena Palmieri Department of Clinical Sciences and Community Health, University of Milan, Fondazione IRCCS Cà Granda-Ospedale Maggiore Policlinico, Milan, Italy

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Davide Iacuaniello Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Napoli, Italy

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Chiara Graziadio Department of Experimental Medicine, University La Sapienza, Rome, Italy

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Luca Damiani Department of Medical Sciences, Endocrinology and Internal Medicine Section, University of Ferrara, Ferrara, Italy

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Marialuisa Zilio Dipartimento di Medicina, U.O.C. Endocrinologia, Università di Padova, Padova, Italy

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Antonio Stigliano Department of Clinical and Molecular Medicine, Sant’Andrea Hospital, University La Sapienza, Rome, Italy

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Annamaria Colao Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Napoli, Italy

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Rosario Pivonello Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Napoli, Italy

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the Altogether to Beat Cushing’s Syndrome (ABC) study group
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suspected CS was confirmed by the lack of cortisol suppression after 1 mg dexamethasone (10 µg/dL, n.v. <1.8) and the absence of a cortisol circadian rhythm (midnight serum cortisol, MserC, 12 µg/dL; n.v. <7.5). Which clinical features are the

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Ferdinand Roelfsema Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Diana van Heemst Department of Internal Medicine, Section Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands

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Ali Iranmanesh Endocrine Section, Medical Service, Salem Veterans Affairs Medical Center, Salem, Virginia, USA

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Paul Takahashi Primary Care Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA

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Rebecca Yang Endocrine Research Unit, Mayo Medical and Graduate Schools, Clinical Translational Research Center, Mayo Clinic, Rochester, Minnesota, USA

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Johannes D Veldhuis Endocrine Research Unit, Mayo Medical and Graduate Schools, Clinical Translational Research Center, Mayo Clinic, Rochester, Minnesota, USA

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1223 – 1228 . ( doi:10.1210/jc.2008-2543 ) 10.1210/jc.2008-2543 10 Sherman B Wysham C Pfohl B. Age-related changes in the circadian rhythm of plasma cortisol in man . Journal of Clinical Endocrinology and Metabolism 1985 61 439

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Josef Köhrle Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany

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Martina Rauner Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany

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Susan A Lanham-New Department of Nutritional Sciences, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK

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receptor in retinal ganglion cells instructs the circadian clock of the suprachiasmatic nucleus and suppresses epiphysial melatonin production, as well as melanophore activation in the skin. This special series on 100 Years of Vitamin D, published in

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Carlijn A Hoekx Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Borja Martinez-Tellez Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
Department of Nursing Physiotherapy and Medicine, SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
Biomedical Research Unit, Torrecárdenas University Hospital, Almería, Spain
CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Granada, Spain

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Maaike E Straat Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Magdalena M A Verkleij Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Mirjam Kemmeren Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Sander Kooijman Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Martin Uhrbom Bioscience Metabolism, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca Gothenburg, Sweden
Department of Medicine, Huddinge, Karolinska Institutet Campus Flemingsberg, Neo Building, Huddinge, Sweden

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Saskia C A de Jager Laboratory of Experimental Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands

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Patrick C N Rensen Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Mariëtte R Boon Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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characteristics of this cohort has been extensively described elsewhere ( 12 ). To study the influence of circadian rhythm on cold-induced changes in serum GDF15 and FGF21 levels, a general linear model with repeated measures was used, with two within

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Gavin P Vinson School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK

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Caroline H Brennan School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK

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Akhisaroglu M Ahmed R Manev H . The pineal gland is critical for circadian Period1 expression in the striatum and for circadian cocaine sensitization in mice . Neuropsychopharmacology 2003 28 2117 – 2123 . 174 Akhisaroglu M Ahmed R Kurtuncu

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Gareth Leng Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, UK

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the circadian rhythms of behaviour that persist in constant darkness. In lesioned hamsters, circadian rhythmicity can be restored by transplanting fragments of neonatal suprachiasmatic nucleus into the third ventricle – and, remarkably, can do so even

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Stefan Schulz
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Anika Mann
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Benjamin Novakhov
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Hugh D Piggins Institute of Pharmacology and Toxicology, Faculty of Life Sciences, Jena University Hospital, Friedrich Schiller University Jena, Drackendorfer Straße 1, D-07747 Jena, Germany

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Amelie Lupp
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receptor is involved in the regulation of normal rhythmic activity of the circadian clock, basal energy expenditure, immune response as well as male reproductive functions (1, 3, 32, 33, 34, 35, 36, 37) . In addition, it has been shown that copy number

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Kerry V Fanson Wildlife Reproductive Centre, School of Life and Environmental Sciences, School of Agriculture and Food Sciences, Taronga Conservation Society Australia, Dubbo, New South Wales, Australia
Wildlife Reproductive Centre, School of Life and Environmental Sciences, School of Agriculture and Food Sciences, Taronga Conservation Society Australia, Dubbo, New South Wales, Australia

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Tamara Keeley Wildlife Reproductive Centre, School of Life and Environmental Sciences, School of Agriculture and Food Sciences, Taronga Conservation Society Australia, Dubbo, New South Wales, Australia
Wildlife Reproductive Centre, School of Life and Environmental Sciences, School of Agriculture and Food Sciences, Taronga Conservation Society Australia, Dubbo, New South Wales, Australia

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Benjamin G Fanson Wildlife Reproductive Centre, School of Life and Environmental Sciences, School of Agriculture and Food Sciences, Taronga Conservation Society Australia, Dubbo, New South Wales, Australia

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) , humans (38) , pandas (39) , and sheep (40) ). The most detailed studies have been conducted in rats, and have shown that this increase is not due to overall upregulation of adrenal activity, but is due to a change in the amplitude of the circadian

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Karim Gariani Service of Endocrinology, Diabetes, Hypertension and Nutrition, Geneva University Hospitals, Geneva, Switzerland

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Pedro Marques-Vidal Departments of Medicine and Internal Medicine, Lausanne University Hospital, Lausanne, Switzerland

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Gérard Waeber Departments of Medicine and Internal Medicine, Lausanne University Hospital, Lausanne, Switzerland

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Peter Vollenweider Departments of Medicine and Internal Medicine, Lausanne University Hospital, Lausanne, Switzerland

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François R Jornayvaz Service of Endocrinology, Diabetes, Hypertension and Nutrition, Geneva University Hospitals, Geneva, Switzerland

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number of diabetes complications ( 19 ). Cortisol secretion follows a circadian rhythm with a nadir at midnight, starts to rise at 02:00–04:00 h, displays a peak briefly after waking up and then shows a progressive decrease during the day ( 20 ). The

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