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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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have not found the evidence that mean cortisol levels differ between cyclic and acyclic females (21, 24) . However, this does not rule out the possibility that more fine-scale patterns of cortisol expression are disrupted in non-cycling elephants. Mean

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Marloes L P Langelaan Clinical Laboratory, Catharina Hospital Eindhoven, Eindhoven, The Netherlands
Department of Clinical Chemistry and Haematology, Zuyderland Medical Centre, Heerlen, The Netherlands

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Jérôme M H Kisters Department of Internal Medicine, Catharina Hospital Eindhoven, Eindhoven, The Netherlands

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Mirjam M Oosterwerff Department of Internal Medicine, Catharina Hospital Eindhoven, Eindhoven, The Netherlands

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Arjen-Kars Boer Clinical Laboratory, Catharina Hospital Eindhoven, Eindhoven, The Netherlands

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Introduction The utility of measuring salivary cortisol has become increasingly popular in, for example, screening for Cushing’s syndrome or disease ( 1 , 2 ). Obtaining salivary samples is easy and patient friendly. An additional advantage

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Deirdre Green Academic Department of Endocrinology, Beaumont Hospital and the Royal College of Surgeons in Ireland, Dublin

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Rosemary Dineen Academic Department of Endocrinology, Beaumont Hospital and the Royal College of Surgeons in Ireland, Dublin

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Michael W O’Reilly Academic Department of Endocrinology, Beaumont Hospital and the Royal College of Surgeons in Ireland, Dublin

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Mark Sherlock Academic Department of Endocrinology, Beaumont Hospital and the Royal College of Surgeons in Ireland, Dublin

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–pituitary–adrenal (HPA) axis, with insufficient adrenocorticotrophic hormone (ACTH) stimulation of the adrenal cortex ( 2 ) leading to deficiency in cortisol and adrenal androgens. This is mostly commonly caused by pituitary tumours and the resultant treatment including

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Sarah Ying Tse Tan Department of Endocrinology, Singapore General Hospital, Singapore

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Hong Chang Tan Department of Endocrinology, Singapore General Hospital, Singapore

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Ling Zhu Department of Endocrinology, Singapore General Hospital, Singapore

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Lih Ming Loh Department of Endocrinology, Singapore General Hospital, Singapore

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Dawn Shao Ting Lim Department of Endocrinology, Singapore General Hospital, Singapore

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Du Soon Swee Department of Endocrinology, Singapore General Hospital, Singapore

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Yoke Ling Chan Department of Speciality Nursing, Singapore General Hospital, Singapore

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Huee Boon Lim Department of Speciality Nursing, Singapore General Hospital, Singapore

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Shiau Lee Ling Department of Speciality Nursing, Singapore General Hospital, Singapore

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En Jun Ou Department of Speciality Nursing, Singapore General Hospital, Singapore

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Wynn Ee Teo Department of Speciality Nursing, Singapore General Hospital, Singapore

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Xiao Ping Zhang Department of Speciality Nursing, Singapore General Hospital, Singapore

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Hui Fen Goh Department of Speciality Nursing, Singapore General Hospital, Singapore

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Peng Chin Kek Department of Endocrinology, Singapore General Hospital, Singapore

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, the adrenocorticotrophic hormone (ACTH) stimulation test (AST) is the most commonly used ( 3 ). During the AST, 250 µg of synthetic ACTH was administered intravenously or intramuscularly, and serum cortisol is drawn at baseline, 30 min, and 60 min

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P Herbert School of Sport, Health and Outdoor Education, Trinity Saint David, University of Wales, Wales, UK

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LD Hayes Active Ageing Research Group, Department of Medical and Sport Sciences, University of Cumbria, Lancaster, UK

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NF Sculthorpe Institute of Clinical Exercise and Health Science, University of the West of Scotland, Scotland, UK

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FM Grace Faculty of Health, Federation University, Victoria, Australia

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out to examine the influence of substituting normal exercise training with a six-week (nine sessions) low-volume HIIT program on PPO, TT, free-T, cortisol and the TT:cortisol ratio, in male masters athletes. We hypothesized that (i) six weeks of low

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Marcus Imamovic Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Nils Bäcklund Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Staffan Lundstedt Department of Medical Biosciences, Umeå University, Umeå, Sweden

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Göran Brattsand Department of Medical Biosciences, Umeå University, Umeå, Sweden

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Elisabeth Aardal Department of Clinical Chemistry and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden

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Tommy Olsson Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Per Dahlqvist Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Introduction Timely diagnosis of endogenous Cushing's syndrome (CS) is important to reduce morbidity and mortality ( 1 , 2 , 3 ). Late-night salivary cortisol (LNSC) is an important screening instrument for CS with high sensitivity and

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Kathrin Zopf Department of Endocrinology, Diabetes and Nutrition, Charité – Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Kathrin R Frey Department of Medicine I, Endocrine and Diabetes Unit, University Hospital, University of Würzburg, Würzburg, Germany

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Tina Kienitz Department of Endocrinology, Diabetes and Nutrition, Charité – Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Manfred Ventz Department of Endocrinology, Diabetes and Nutrition, Charité – Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Britta Bauer Endocrinology in Charlottenburg, Berlin, Germany

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Marcus Quinkler Endocrinology in Charlottenburg, Berlin, Germany

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of 37.7 months. Second, it is still unknown how the Bcl I polymorphism exerts its effects. After administration of dexamethasone, serum cortisol levels were lower in G-allele carriers of the BclI polymorphism, pointing to a greater glucocorticoid

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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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hypertension, might be linked with an excess of glucocorticoid secretion ( 2 , 3 , 4 ). Patients with metabolic syndrome and concomitantly higher fasting cortisol have been related with more prevalent central obesity and hypertension, a higher triglycerides

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Fahim Ebrahimi Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, University of Basel Hospital, Basel, Switzerland
Department of Clinical Research, University of Basel Hospital, Basel, Switzerland

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Sandrine A Urwyler Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, University of Basel Hospital, Basel, Switzerland
Department of Clinical Research, University of Basel Hospital, Basel, Switzerland

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Philipp Schuetz Department of Clinical Research, University of Basel Hospital, Basel, Switzerland
Division of Endocrinology, Diabetes and Metabolism, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland

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Beat Mueller Department of Clinical Research, University of Basel Hospital, Basel, Switzerland
Division of Endocrinology, Diabetes and Metabolism, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland

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Luca Bernasconi Department of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland

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Peter Neyer Department of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland

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Marc Y Donath Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, University of Basel Hospital, Basel, Switzerland
Department of Clinical Research, University of Basel Hospital, Basel, Switzerland

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Mirjam Christ-Crain Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, University of Basel Hospital, Basel, Switzerland
Department of Clinical Research, University of Basel Hospital, Basel, Switzerland

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adrenocorticotropin hormone (ACTH)-producing cells in the pituitary gland ( 7 ) and third in the adrenal glands with direct stimulatory effect on cortisol production ( 11 ). Therapeutic interventions aimed at counteracting inflammatory activation have proven

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Britt J van Keulen Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Pediatric Endocrinology, Amsterdam, The Netherlands

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Conor V Dolan Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Bibian van der Voorn Department of Pediatric Endocrinology, Sophia Kinderziekenhuis, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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Ruth Andrew Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK

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Brian R Walker Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK

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Hilleke Hulshoff Pol Department of Psychiatry, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands

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Dorret I Boomsma Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Joost Rotteveel Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Pediatric Endocrinology, Amsterdam, The Netherlands

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Martijn J J Finken Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Pediatric Endocrinology, Amsterdam, The Netherlands

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cortisol levels. Compared to girls, boys, up to age 8, had higher salivary cortisol levels and lower levels beyond this age ( 11 ). The timing of this change suggests that sex steroids influence the HPA axis. Surprisingly, to the best of our knowledge

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