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Jane Fletcher Nutrition Nurses, University Hospitals Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Edgbaston, Birmingham, UK
School of Nursing, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, UK

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Emma L Bishop Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK

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Stephanie R Harrison Leeds Institute of Rheumatic and Musculoskeletal Medicine, Chapel Allerton Hospital, Leeds, UK

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Amelia Swift School of Nursing, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, UK

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Sheldon C Cooper Gastroenterology Department, University Hospitals Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Edgbaston, Birmingham, UK

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Sarah K Dimeloe Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK

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Karim Raza Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK

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Martin Hewison Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK

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), 1,25D functions as a steroid hormone to regulate transcription ( 4 ) and epigenomic effects ( 5 ). In this endocrine setting, 1,25D is thus able to promote the gastrointestinal acquisition of dietary minerals such as calcium and phosphate. 1,25D also

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Fernanda A Correa Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Ericka B Trarbach Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Cintia Tusset Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Ana Claudia Latronico Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Luciana R Montenegro Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Luciani R Carvalho Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Marcela M Franca Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Aline P Otto Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Everlayny F Costalonga Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Vinicius N Brito Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Ana Paula Abreu Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Mirian Y Nishi Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Alexander A L Jorge Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Ivo J P Arnhold Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Yisrael Sidis Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Nelly Pitteloud Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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Berenice B Mendonca Unidade de Endocrinologia do Desenvolvimento, Unidade de Endocrinologia Genética, Centre Hospitalier Universitaire Vaudois (CHUV), Division of Endocrinology, Laboratório de Hormônios e Genética Molecular LIM42

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is located within the last intracellular loop, and results of functional analyses revealed normal transcription activity in an Erg-Luc assay but decreased calcium mobilization activity (72% of WT) in an aequorin-based Ca 2+ flux assay. Its expression

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Melissa Braga Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA

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Zena Simmons Department of Health & Life Sciences, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA

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Keith C Norris Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA

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Monica G Ferrini Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Health & Life Sciences, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA

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Jorge N Artaza Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Health & Life Sciences, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA

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Introduction Vitamin D is universally recognized for its classical effects on calcium regulation and phosphate homeostasis, in relation to bone development and maintenance ( 1 , 2 ). However, vitamin D deficiency has also been linked to the

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Jeremy Turner Norfolk and Norwich University Hospital, Colney Lane, Norwich, UK

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Neil Gittoes Centre for Endocrinology, Diabetes and Metabolism, University Hospitals Birmingham & University of Birmingham, Birmingham Health Partners, Birmingham, UK

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Peter Selby Department of Medicine, Manchester Royal Infirmary, Manchester, UK

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the Society for Endocrinology Clinical Committee The Society for Endocrinology, 22 Apex Court, Woodlands, Bradley Stoke, Bristol, UK

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Introduction Acute hypocalcaemia can be life threatening, necessitating urgent treatment. In severe cases, intravenous calcium forms the mainstay of initial therapy, but it is essential to ascertain the underlying cause and commence specific

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Jennifer Walsh The Mellanby Centre for Bone Research, The Medical School, The University of Sheffield, Sheffield, UK

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Neil Gittoes Centre for Endocrinology, Diabetes and Metabolism, University Hospitals Birmingham & University of Birmingham, Birmingham Health Partners, Birmingham, UK

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Peter Selby Department of Medicine, Manchester Royal Infirmary, Manchester, UK

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the Society for Endocrinology Clinical Committee The Society for Endocrinology, 22 Apex Court, Woodlands, Bradley Stoke, Bristol, UK

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Introduction Under physiological conditions, serum calcium concentration is tightly regulated. Abnormalities of parathyroid function, bone resorption, renal calcium reabsorption or dihydroxylation of vitamin D may cause regulatory mechanisms

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Malachi J McKenna St Michael's Hospital, Metabolism Laboratory, School of Medicine and Medical Sciences, Dún Laoghaire, Dublin, Ireland
St Michael's Hospital, Metabolism Laboratory, School of Medicine and Medical Sciences, Dún Laoghaire, Dublin, Ireland
St Michael's Hospital, Metabolism Laboratory, School of Medicine and Medical Sciences, Dún Laoghaire, Dublin, Ireland

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Barbara F Murray St Michael's Hospital, Metabolism Laboratory, School of Medicine and Medical Sciences, Dún Laoghaire, Dublin, Ireland

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Introduction Two conflicting reports on vitamin D intake requirements were published in 2011: Institute of Medicine (IOM) report on Dietary Reference Intakes for Calcium and Vitamin D and the Endocrine Society's Clinical Practice Guideline (CPG

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Luchuan Li Department of Thyroid Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China

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Baoyuan Li Department of Thyroid Surgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China

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Bin Lv Department of Thyroid Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China

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Weili Liang Department of Thyroid Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China

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Binbin Zhang Department of Thyroid Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China

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Qingdong Zeng Department of Thyroid Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China

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Andrew G Turner Clinical and Health Sciences, University of South Australia, Adelaide, South Australia, Australia

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Lei Sheng Department of Thyroid Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China

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Introduction Primary hyperparathyroidism (PHPT) is a common endocrine disorder, having a prevalence of 0.04–0.1% in the general population ( 1 ). The principal role of parathyroid hormone (PTH) is to maintain (raise) blood calcium levels in

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Maria Mizamtsidi Department of Endocrinology, Diabetes and Metabolism, Hellenic Red Cross Hospital, Athens, Greece

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Constantinos Nastos Second Department of Surgery, Endocrine Surgery Unit, Aretaieion University Hospital, National and Kapodistrian University of Athens, Athens, Greece

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George Mastorakos Unit of Endocrinology, Diabetes and Metabolism, Aretaieion University Hospital, National and Kapodistrian University of Athens, Athens, Greece

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Roberto Dina Department of Pathology, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK

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Ioannis Vassiliou Second Department of Surgery, Endocrine Surgery Unit, Aretaieion University Hospital, National and Kapodistrian University of Athens, Athens, Greece

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Maria Gazouli Department of Basic Medical Sciences, Laboratory of Biology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece

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Fausto Palazzo Department of Thyroid and Endocrine Surgery, Imperial College London, London, UK

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is normocalcemic pHPT, which is an abnormality of the relationship between calcium and PTH. Normocalcemic pHPT presents with calcium levels within the normal range and the diagnosis could be revealed, with the use of calcium loading test: When an oral

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Rolf Jorde Tromsø Endocrine Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway

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Guri Grimnes Tromsø Endocrine Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway

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Introduction Vitamin D is essential for intestinal calcium absorption and skeletal health. Vitamin D deficiency in children may lead to rickets, which can be prevented and/or treated by vitamin D supplementation ( 1 ). In addition to its

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Magdaléna Fořtová Department of Medical Chemistry and Clinical Biochemistry, Charles University, Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic

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Lenka Hanousková Department of Medical Chemistry and Clinical Biochemistry, Charles University, Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic

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Martin Valkus Department of Medical Chemistry and Clinical Biochemistry, Charles University, Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic

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Jana Čepová Department of Medical Chemistry and Clinical Biochemistry, Charles University, Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic

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Richard Průša Department of Medical Chemistry and Clinical Biochemistry, Charles University, Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic

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Karel Kotaška Department of Medical Chemistry and Clinical Biochemistry, Charles University, Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic

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Introduction About 80–90% of primary hyperparathyroidism (pHPT) cases are caused by parathyroid adenoma. Long-term increased parathyroid hormone (PTH) secretion leads to a generalized disorder of calcium, phosphate and bone metabolism. The

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