[1] Kantonsspital, Med Klin, CH-8401 Winterthur, Switzerland
[2] Med Univ Klin Liestal, CH-4410 Liestal, Switzerland
[3] Spital Uster, CH-8610 Uster, Switzerland
[4] Spital Altstatten, CH-9450 Altstatten, Switzerland
[5] Spital Zimmerberg, CH-8810 Horgen, Switzerland
[6] Spital Zollikerberg, CH-8125 Zollikerberg, Switzerland
[7] Kantonsspital Nidwalden, CH-6370 Stans, Switzerland