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Genfeng Yu Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Siyang Liu Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Cheng Song Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Qintao Ma Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Xingying Chen Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Yuqi Jiang Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Hualin Duan Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Yajun He Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Dongmei Wang Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Heng Wan Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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Jie Shen Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Guangdong, China

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central sensitivity indices include the thyrotroph thyroxine resistance index (TT4RI) and TSH index (TSHI). The FT3/FT4 ratio reflects deiodinase activity and is a proxy for peripheral thyroid hormone sensitivity ( 21 ). Central resistance phenomena affect

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Jan Debeij Departments of Clinical Epidemiology, Leiden University Medical Centre, Leiden

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Suzanne C. Cannegieter Departments of Clinical Epidemiology, Leiden University Medical Centre, Leiden
Departments of Thrombosis and Haemostasis, Leiden University Medical Centre, Leiden

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Bregje van Zaane Departments of Internal Medicine, Slotervaart Hospital
Department of Vascular Medicine, Academic Medical Centre, Amsterdam, The Netherlands

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Anton P. van Zanten Departments of Clinical Biochemistry, Slotervaart Hospital

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Frits R. Rosendaal Departments of Clinical Epidemiology, Leiden University Medical Centre, Leiden
Departments of Thrombosis and Haemostasis, Leiden University Medical Centre, Leiden
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Centre, Leiden

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Victor E.A. Gerdes Departments of Internal Medicine, Slotervaart Hospital
Department of Vascular Medicine, Academic Medical Centre, Amsterdam, The Netherlands

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Pieter H. Reitsma Departments of Thrombosis and Haemostasis, Leiden University Medical Centre, Leiden
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Centre, Leiden

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Olaf M. Dekkers Departments of Clinical Epidemiology, Leiden University Medical Centre, Leiden
Departments of Endocrinology and Metabolism, Leiden University Medical Centre, Leiden

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, such as comorbidities, older age and use of comedication [ 1 , 2 ]. Recently the relation between thyroid hormone and the coagulation system has gained interest as a focus of research [ 3 , 4 , 5 , 6 , 7 ]. High levels of free thyroxine (fT 4 ) are

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Laura P.B. Elbers Department of Internal Medicine, Medical Center Slotervaart, University of Amsterdam, Amsterdam
Departments of Vascular Medicine, University of Amsterdam, Amsterdam

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Hjalmar A. Boon Department of Internal Medicine, Medical Center Slotervaart, University of Amsterdam, Amsterdam

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Maaike I. Moes Department of Internal Medicine, Medical Center Slotervaart, University of Amsterdam, Amsterdam

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Bregje van Zaane Department of Internal Medicine, Medical Center Slotervaart, University of Amsterdam, Amsterdam
Departments of Vascular Medicine, University of Amsterdam, Amsterdam

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Dees P.M. Brandjes Department of Internal Medicine, Medical Center Slotervaart, University of Amsterdam, Amsterdam
Departments of Vascular Medicine, University of Amsterdam, Amsterdam

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Eric Fliers Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam

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Harry R. Büller Departments of Vascular Medicine, University of Amsterdam, Amsterdam

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Suzanne Cannegieter Department of Clinical Epidemiology, Leiden University Medical Center
Einthoven Laboratory for Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

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Victor E.A. Gerdes Department of Internal Medicine, Medical Center Slotervaart, University of Amsterdam, Amsterdam
Departments of Vascular Medicine, University of Amsterdam, Amsterdam

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thromboembolism (VTE) or bleeding. Higher plasma levels of free thyroxine (FT 4 ) have been associated with an increased VTE risk [ 1 , 2 , 3 ]. Conversely, lower levels of FT 4 seem to be associated with a bleeding tendency [ 4 , 5 ]. An observational cohort

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Salman Razvi Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
Department of Endocrinology, Gateshead Health NHS Foundation Trust, Gateshead, UK

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Avais Jabbar Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
Department of Cardiology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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Arjola Bano Department of Cardiology, Institute of Social and Preventive Medicine, University of Bern, Bern University Hospital, Bern, Switzerland

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Lorna Ingoe Department of Endocrinology, Gateshead Health NHS Foundation Trust, Gateshead, UK

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Peter Carey Departments of Endocrinology and Cardiology, South Tyneside and Sunderland NHS Foundation Trust, Sunderland, UK

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Shahid Junejo Departments of Endocrinology and Cardiology, South Tyneside and Sunderland NHS Foundation Trust, Sunderland, UK

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Honey Thomas Department of Cardiology, Northumbria Healthcare NHS Foundation Trust, Cramlington, UK

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Caroline Addison Department of Biochemistry, Gateshead Health NHS Foundation Trust, Gateshead, UK

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David Austin Department of Cardiology, South Tees Health NHS Foundation Trust, Middlesbrough, UK

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John P Greenwood Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK

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Azfar G Zaman Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
Department of Cardiology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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in groups B (low FT3 and low CRP), C (medium FT3 and low, medium and high CRP) and D (high FT3 and high CRP) had an increased risk of subsequent mortality (hazard ratios between 1.42 and 1.52) compared to group E. Figure 4 T3 and CRP levels and

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Rudolf Hoermann Department of Nuclear Medicine, Klinikum Luedenscheid, Luedenscheid, Germany

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John E.M. Midgley North Lakes Clinical, Ilkley, UK

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Rolf Larisch Department of Nuclear Medicine, Klinikum Luedenscheid, Luedenscheid, Germany

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Johannes W. Dietrich Medical Department I, Endocrinology and Diabetology, Bergmannsheil University Hospitals, Ruhr University of Bochum
Ruhr Center for Rare Diseases (CeSER), Ruhr University of Bochum and Witten/Herdecke University, Bochum, Germany

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ELISA (Anti-TSH-Receptor; EUROIMMUN AG, Luebeck, Germany). Interrelational Measures As a simple estimate of the conversion of T 4 to T 3 , we used the FT 3 -FT 4 ratio of the molar serum concentrations of the hormones. We divided FT 4 by TSH

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Giulia Brigante Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Giorgia Spaggiari Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Daniele Santi Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Katia Cioni Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Valentina Gnarini Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Chiara Diazzi Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Elisa Pignatti Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Center of Genomic Research, University of Modena and Reggio Emilia

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Livio Casarini Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Center of Genomic Research, University of Modena and Reggio Emilia

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Marco Marino Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Center of Genomic Research, University of Modena and Reggio Emilia

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Frank Tüttelmann Institute of Human Genetics, University of Munster, Munster, Germany

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Cesare Carani Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Azienda USL, Modena, Italy

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Manuela Simoni Unit of Endocrinology and Metabolism, Department of Biomedical, Metabolic and Neural Sciences
Center of Genomic Research, University of Modena and Reggio Emilia
Azienda USL, Modena, Italy

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, there were no differences among the three groups (respectively p = 0.71; p = 0.34). No significant differences were found in serum levels of fT 3 (p = 0.59), fT 4 (p = 0.16), Ab anti-TG (p = 0.48), fT 3 /fT 4 ratio (p = 0.76) and fT 3 /TSH ratio (p

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Françoise Brucker-Davis Department of Endocrinology, Diabetology and Reproductive Medicine
Institut National de la Recherche Médicale, UMR U895, Université Nice-Sophia Antipolis, Nice, France

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Patricia Panaïa-Ferrari Departments of Biochemistry, UMR U895, Université Nice-Sophia Antipolis, Nice, France

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Jocelyn Gal Departments of Biostatistics, CHU de Nice, UMR U895, Université Nice-Sophia Antipolis, Nice, France

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Patrick Fénichel Department of Endocrinology, Diabetology and Reproductive Medicine
Institut National de la Recherche Médicale, UMR U895, Université Nice-Sophia Antipolis, Nice, France

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Sylvie Hiéronimus Department of Endocrinology, Diabetology and Reproductive Medicine

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5th or 10th percentile of the reference range for FT4 associated with normal TSH [ 3 , 4 ]. There is, however, the question of threshold for normal values, linked in part to the lack of laboratory reference ranges in pregnancy. The association of

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Veeravich Jaruvongvanich Department of Internal Medicine, University of Hawaii, Honolulu, HI, USA
Department of Medicine, King Chulalongkorn Memorial Hospital, Bangkok, Thailand

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Anawin Sanguankeo Department of Internal Medicine, Bassett Medical Center and Columbia University College of Physicians and Surgeons, Cooperstown, NY, USA
Department of Preventive and Social Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

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Sikarin Upala Department of Internal Medicine, Bassett Medical Center and Columbia University College of Physicians and Surgeons, Cooperstown, NY, USA
Department of Preventive and Social Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

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F, Mamac RY, Yenigun M: FT 3 /FT 4 ratio predicts non-alcoholic fatty liver disease independent of metabolic parameters in patients with euthyroidism and hypothyroidism. Clinics (Sao Paulo) 2016;71:221-225. 10.6061/clinics/2016(04)08 27166773

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Érique José F. Peixoto de Miranda Centro de Pesquisa Clínica, Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil

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Márcio Sommer Bittencourt Centro de Pesquisa Clínica, Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil

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Itamar S. Santos Centro de Pesquisa Clínica, Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil

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Paulo A. Lotufo Centro de Pesquisa Clínica, Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil

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Isabela M. Benseñor Centro de Pesquisa Clínica, Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil

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overnight fast. fT 4 levels were only evaluated in participants who presented altered TSH levels. In this study, reference range levels were 0.4-4.0 μIU/ml for TSH and 10.3-24.45 pmol/l for fT 4 , i.e. similar to those used in the National Health and

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Tanja Diana Molecular Thyroid Research Laboratory, Department of Medicine I, Johannes Gutenberg University (JGU) Medical Center, Mainz, Germany

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Hans-Peter Holthoff AdvanceCor GmbH, Martinsried, Germany

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Julia Fassbender AdvanceCor GmbH, Martinsried, Germany

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Christian Wüster Endocrine Laboratory and Practice Prof. Wüster, Mainz, Germany

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Michael Kanitz Molecular Thyroid Research Laboratory, Department of Medicine I, Johannes Gutenberg University (JGU) Medical Center, Mainz, Germany

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George J. Kahaly Molecular Thyroid Research Laboratory, Department of Medicine I, Johannes Gutenberg University (JGU) Medical Center, Mainz, Germany

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Martin Ungerer AdvanceCor GmbH, Martinsried, Germany

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week 27 (1.4 ng/mL [1.1; 1.7]), respectively. In contrast, in Ad-TSHR-immunized mice, fT4 concentrations were markedly higher at weeks 17 (4.4 ng/mL [3.9; 6]) and 27 (4.5 ng/mL [4.2; 6]) than in Ad-GFP-immunized mice (2 ng/mL [1.8; 2.1] and 1.4 ng/mL [1

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