[1] La Tour Hosp, Div Orthopaed & Trauma Surg, 3 Rue JD Maillard, CH-1217 Meyrin, Switzerland
[2] Univ Geneva, Fac Med, 1 Rue Michel Servet, CH-1211 Geneva 4, Switzerland
[3] Univ Hosp Geneva, Dept Surg, Div Orthopaed & Trauma Surg, 4 Rue Gabrielle Perret Gentil, CH-1211 Geneva 14, Switzerland
[4] St Francis Mem Hosp, Ctr Sports Med, San Francisco, CA 94109 USA