Schäfer S, Schardt C, Burkhard-Meier U, Klein R M, Heintzen M P, Strauer B E
Department of Cardiology, Pneumology, and Angiology, Heinrich-Heine-University, Düsseldorf, Germany.
Circulation. 1996 Dec 15;94(12):3376-81. doi: 10.1161/01.cir.94.12.3376.