Gynecology Department, Centre hospitalier de Lorient, Lorient, France. Electronic address: patrick.zemb@orange.fr. Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden. Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA. Department of Clinical Chemistry, University of Liège, CHU de Liège, Liège, Belgium. Department of Rheumatology, Cochin Hospital, AP-HP, Paris, France. Department of Physiology, Georges Pompidou European Hospital, AP-HP, Paris, France. Medical University of South Carolina, Charleston, SC, USA. Center of Research in Cardiovascular and Nutrition (C2VN), Aix-Marseille University & INSERM 1260, France. Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, 'Sapienza', Rome University, Viale del Policlinico 155, Rome, 00161 Italy. Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria. Department of Biochemistry, Radioimmunology and Experimental Medicine, The Children's Memorial Health Institute, Warsaw, Poland. Department of Laboratory Medicine, Centre hospitalier de Lorient, Lorient, France. Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania. Department of Physiology, Necker-Enfants malades hospital, AP-HP, Paris, France.