[1] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[2] Amer Univ Beirut, Med Ctr, Beirut, Lebanon
[3] Univ Ljubljana, Golnik, Slovenia
[4] Univ Clin Golnik, Golnik, Slovenia
[5] Natl Canc Inst Argentina, Latin Amer & Caribbean Soc Med Oncol, Buenos Aires, DF, Argentina
[6] St Lukes Med Ctr, Quezon City, Philippines
[7] Univ Nairobi, Nairobi, Kenya
[8] Univ Nacl Autonoma Honduras, Tegucigalpa, Honduras
[9] Amer Soc Clin Oncol, Alexandria, VA USA