[1] Univ Autonoma Madrid, Med Interna Serv, Madrid, Spain
[2] City Hosp Nottingham, David Evans Med Res Ctr, Nottingham, England
[3] Univ Hosp, Dept Rehabil & Geriat, Geneva, Switzerland
[4] Univ Hosp, INSERM, Lyon, France
[5] Metab Unit, Dept Internal Med, Florence, Italy
[6] Humboldt Univ, Berlin, Germany
[7] Free Univ Berlin, Ctr Muscle & Bone Res, Charite Campus Benjamin Franklin, D-1000 Berlin, Germany
[8] NYCOMED AS, Int Med Sci Strategy & Med Mkt, Roskilde, Denmark