[1] Toronoto Gen Hosp, Toronto, ON, Canada
[2] Isped S Giovanno Battista, Turin, Italy
[3] Univ Hong Kong, Queen Mary Hosp, Hong Kong, Peoples R China
[4] Linkou Chang Gung Mem Hosp, Tao Yuan, Taiwan
[5] Hosp Italiano Buenos Aires, Reg Del Sor, Buenos Aires, DF, Argentina
[6] Univ Miami, Miami, FL 33152 USA
[7] Myers Squibb Pharmaceut Res Inst, Wallingford, CT USA
[8] Bristol Myers Squibb Pharmaceut Res Inst, Princeton, NJ USA
[9] Cornell Univ, Weill Med Coll, Dept Med, New York, NY USA