1. Herlev University Hospital; Department of Internal Medicine; Herlev Ringvej 75 Herlev Denmark DK-2730
2. Hospital General de Granollers and School of Medicine and Health Sciences. Universitat Internacional de Catalunya (UIC); Medicine Department; Francesc Ribas s/n Granollers Spain 08402
3. Hospital Universitari Germans Trias i Pujol - CIBERDEM; Department of Endocrinology and Nutrition; Carretera Canyet S/N Badalona Spain 08916
4. CIBER Epidemiología y Salud Pública (CIBERESP); Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau); Sant Antoni Maria Claret 171 Edifici Casa de Convalescència Barcelona Catalunya Spain 08041
5. Institute of General Practice, Medical Faculty of the Heinrich-Heine-University Düsseldorf; Cochrane Metabolic and Endocrine Disorders Group; Moorenstr. 5 Düsseldorf Germany 40225