[1] Penn State Univ, Milton S Hershey Med Ctr, Lebanon VA Med Ctr, Lebanon, PA USA
[2] MD Anderson Canc Ctr, Houston, TX USA
[3] Mem Sloan Kettering Canc Ctr, Dept Oncol, New York, NY 10021 USA
[4] Yale Univ, New Haven, CT USA
[5] Univ Hosp Vienna, Div Oncol, Vienna, Austria
[6] Tenon Hosp, Med Oncol Serv, Paris, France
[7] Humboldt Univ, Berlin, Germany
[8] Rene Huguenin Canc Ctr, Paris, France
[9] Penn State Univ, Milton S Hershey Med Ctr, Hershey, PA 17033 USA