[1] Int Breast Canc Study Grp, Coordinating Ctr, Effingerstr 40, CH-3008 Bern, Switzerland
[2] Swiss Grp Clin Canc Res, Coordinating Ctr, Effingerstr 33, CH-3008 Bern, Switzerland
[3] Kantonsspital St Gallen, Rorschacher Str 95, CH-9007 St Gallen, Switzerland
[4] Kantonsspital Graubunden, Loestr 170, CH-7000 Chur, Switzerland
[5] Inselspital Bern, Freiburgstr 8, CH-3010 Bern, Switzerland
[6] IOSI, CH-6500 Bellinzona, Switzerland
[7] Kantonsspital Winterthur, Brauerstr 15, CH-8401 Winterthur, Switzerland
[8] Univ Bern, ISPM, Finkenhubelweg 11, CH-3012 Bern, Switzerland
[9] Boston Univ, Sect Geriatr, Med Ctr, Harrison Ave, Boston, MA 02111 USA