[1] Seoul Natl Univ Hosp, Seoul, South Korea
[2] Univ Ulsan, Asan Med Ctr, Coll Med, Seoul, South Korea
[3] Hackensack Univ, John Theurer Canc Ctr, Med Ctr, Hackensack, NJ USA
[4] Univ Siena, Siena, Italy
[5] Univ Hosp Siena, Ctr Immunooncol, Siena, Italy
[6] Alfred Hlth, Alfred, NY, Australia
[7] Merck & Co Inc, Rahway, NJ USA
[8] Hosp Clin Barcelona, Barcelona, Spain