1. Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
2. Centre for Evidence-Based Chinese Medicine; Beijing University of Chinese Medicine; Beijing China
3. Department of Cardiology, Nephrology and Endocrinology; Nordsjaellands Hospital; Hillerød Denmark
4. Cochrane Metabolic and Endocrine Disorders Group; Institute of General Practice, Medical Faculty of the Heinrich-Heine-University Düsseldorf; Düsseldorf Germany