Vetsch Gabi, Pato Urs, Fischli Stefan, Lepper Sabine, Lönnfors-Weitzel Tarja, Offinger Alexander, Bürgi Ulrich, Schiemann Uwe
Department of Internal Medicine, Inselspital, University of Bern, Switzerland.
Lancet. 2008 May 31;371(9627):1886. doi: 10.1016/S0140-6736(08)60803-X.