Wahrenberg Hans, Hertel Katarina, Leijonhufvud Britt-Marie, Persson Lars-Göran, Toft Eva, Arner Peter
Department of Medicine M61, Karolinska Institutet at Karolinska University Hospital, Huddinge, SE-141 86 Stockholm, Sweden.
BMJ. 2005 Jun 11;330(7504):1363-4. doi: 10.1136/bmj.38429.473310.AE. Epub 2005 Apr 15.