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Kim K B Clemmensen Department of Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark

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Jonas S Quist Department of Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark

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Dorte Vistisen Department of Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark

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Daniel R Witte Department of Public Health, Aarhus University, Aarhus, Denmark
Danish Diabetes Academy, Odense, Denmark

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Anna Jonsson NNF Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark

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Oluf Pedersen NNF Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark

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Torben Hansen NNF Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark

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Jens J Holst NNF Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark

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Torsten Lauritzen Section for General Practice, Department of Public Health, Aarhus University, Aarhus, Denmark

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Marit E Jørgensen Department of Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark
National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark

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Signe Torekov NNF Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark

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Kristine Færch Department of Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark

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Introduction Glucose metabolism exhibits circadian rhythmicity ( 1 , 2 ). Longer fasting duration before an oral glucose tolerance test (OGTT) has been associated with lower fasting glucose but higher post-load glucose levels ( 3

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Dorte Glintborg Department of Endocrinology and Metabolism, Odense University Hospital, Odense C, Denmark

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Hanne Mumm Department of Endocrinology and Metabolism, Odense University Hospital, Odense C, Denmark

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Jens Juul Holst Department of Biomedical Sciences and NNF Centre for Basic Metabolic Research, The Panum Institute, University of Copenhagen, Copenhagen, Denmark

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Marianne Andersen Department of Endocrinology and Metabolism, Odense University Hospital, Odense C, Denmark

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, but we are not aware of controlled studies that investigated the effect of metformin on GLP-1 levels or risk of RH in PCOS. The primary aim of the present study was to perform 5-h oral glucose tolerance tests (5-h OGTT) and evaluate the possible

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Alberto Battezzati International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy

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Andrea Foppiani International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy

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Gianfranco Alicandro Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Arianna Bisogno Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Arianna Biffi Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Giorgio Bedogni Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
Internal Medicine, S. Maria delle Croci Hospital, AUSL Romagna, Ravenna, Italy

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Simona Bertoli International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy
Istituto Auxologico Italiano, IRCCS, Obesity Unit - Laboratory of Nutrition and Obesity Research, Department of Endocrine and Metabolic Diseases, Milan, Italy

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Giulia De Carlo International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy

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Erica Nazzari Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Carla Colombo Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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(IVGTT) ( 4 , 5 , 6 , 7 , 8 ). In larger studies based on the analysis of insulin and C-peptide responses during oral glucose tolerance tests (OGTTs). These secretory defects were found to be frequent, also in normotolerant CF patients who compensate

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Giovanni Fanni Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden

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Petros Katsogiannos Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden

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Bipasha Nandi Jui Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden

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Magnus Sundbom Department of Surgical Sciences, Uppsala University, Uppsala, Sweden

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Susanne Hetty Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden

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Maria J Pereira Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden

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Jan W Eriksson Department of Medical Sciences, Clinical Diabetes and Metabolism, Uppsala University, Uppsala, Sweden

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affects endocrine responses to this aminoacidic stimulus ( 18 ). The oral glucose tolerance test (OGTT) is a standardized technique to assess the metabolic and overall hormonal response to an oral glucose load and is a validated diagnostic tool for

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Taísa A R Vicente
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Ívina E S Rocha
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Roberto Salvatori Division of Endocrinology, Division of Endocrinology, National Research Council, Federal University of Sergipe, Aracaju, Sergipe 49060-100, Brazil

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Carla R P Oliveira
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Rossana M C Pereira
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Anita H O Souza
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Viviane C Campos
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Elenilde G Santos
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Rachel D C Araújo Diniz
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Eugênia H O Valença
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Carlos C Epitácio-Pereira
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Mario C P Oliveira
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Andrea Mari Division of Endocrinology, Division of Endocrinology, National Research Council, Federal University of Sergipe, Aracaju, Sergipe 49060-100, Brazil

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Manuel H Aguiar-Oliveira
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measured by homeostatic model assessment of insulin resistance (HOMA–IR) – despite increased fat mass percentage (6) . In these subjects, βCF – assessed by the insulin response during an oral glucose tolerance test (OGTT) – also seems to be impaired

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David P Sonne Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark
Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark

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Asger Lund Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark
Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark

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Jens Faber Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark

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Jens J Holst Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark

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Tina Vilsbøll Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark
Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark

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Filip K Knop Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark
Department of Medicine, Department of Biomedical Sciences, Department of Endocrinology, Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, DK-2900 Hellerup, Denmark

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modulate the thyroid hormone axis accordingly in both type 2 diabetes patients and controls. Moreover, in a second study in type 2 diabetes patients, using oral glucose tolerance test (OGTT) and isoglycaemic intravenous glucose infusions (IIGI), we analysed

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Michelle J Galvan Metabolic, Nutrition, and Exercise Research (MiNER) Laboratory, Department of Kinesiology, University of Texas at El Paso, El Paso, Texas, USA

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Michael J Sanchez Metabolic, Nutrition, and Exercise Research (MiNER) Laboratory, Department of Kinesiology, University of Texas at El Paso, El Paso, Texas, USA

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Andrew J McAinch Institute for Health and Sport (IHES), Victoria University, Melbourne, Victoria, Australia
Australian Institute for Musculoskeletal Science (AIMSS), Victoria University, Melbourne, Victoria, Australia

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Jeffrey D Covington Department of Pathology, University of Massachusetts Medical School, Worcester, Massachusetts, USA

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Jason B Boyle Metabolic, Nutrition, and Exercise Research (MiNER) Laboratory, Department of Kinesiology, University of Texas at El Paso, El Paso, Texas, USA

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Sudip Bajpeyi Metabolic, Nutrition, and Exercise Research (MiNER) Laboratory, Department of Kinesiology, University of Texas at El Paso, El Paso, Texas, USA

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flexions and extensions of the dominant limb (at 60° per second). Dietary control Participants were provided with food for 2 days prior to OGTT to control the dietary effects on insulin sensitivity and blood profile. Meals were designed to comply

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Hong Wang Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Jie Cao Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Jian-bin Su Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Xue-qin Wang Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Dong-mei Zhang Medical Research Center, Affiliated Hospital 2 of Nantong University, and First People’s Hospital of Nantong City, Nantong, China

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Xiao-hua Wang Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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large sample clinical studies. An alternative method of evaluating insulin sensitivity has been derived from the oral glucose tolerance test (OGTT). Basal insulin resistance assessed by homeostasis model assessment of insulin resistance (HOMA-IR) and

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Dorte Glintborg Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark

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Magda Lambaa Altinok Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark

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Pernille Ravn Department of Gynecology and Obstetrics, Odense University Hospital, Odense, Denmark

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Kurt Bjerregaard Stage Department of Psychiatry, Odense University Hospital, Odense, Denmark

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Kurt Højlund Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark

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Marianne Andersen Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark

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from each patient after full explanation of the purpose and nature of all procedures used. Study protocol Patients underwent clinical examination, fasting blood samples, pregnancy test, ACTH test and OGTT and answered questionnaires by time of

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M Jensterle Department of Endocrinology, Diabetes and Metabolic Diseases, University Medical Centre Ljubljana, Ljubljana, Slovenia

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A Podbregar University Rehabilitation Institute Republic of Slovenia, Ljubljana, Slovenia

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K Goricar University of Ljubljana, Faculty of Medicine, Institute of Biochemistry, Pharmacogenetics Laboratory, Ljubljana, Slovenia

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N Gregoric Department of Endocrinology, Diabetes and Metabolic Diseases, University Medical Centre Ljubljana, Ljubljana, Slovenia

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A Janez Department of Endocrinology, Diabetes and Metabolic Diseases, University Medical Centre Ljubljana, Ljubljana, Slovenia

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[1] 143 ± 18 0.023 144 ± 12 [1] 138 ± 13 [1] 0.387 0.611 BP diastolic (mmHg) 92 ± 10 [1] 88 ± 17 0.065 88 ± 13 [1] 87 ± 10 [1] 0.074 0.470 Glu 0 min OGTT (mmol/L) 8.1 ± 3.2 6.8 ± 2.3 0.294 6.2 ± 1

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