Severe lymphopenia during neoadjuvant chemoradiation for esophageal cancer: A propensity matched analysis of the relative risk of proton versus photon-based radiation therapy

Yutaka Shiraishi, Penny Fang, Cai Xu, Juhee Song, Sunil Krishnan, Eugene J. Koay, Reza J. Mehran, Wayne L. Hofstetter, Mariela Blum-Murphy, Jaffer A. Ajani, Ritsuko Komaki, Bruce Minsky, Radhe Mohan, Charles C. Hsu, Brian P. Hobbs, Steven H. Lin