Estimation of Physiological Ability and Surgical Stress Score Is a Useful Prognostic Indicator for Elderly Patients with Colorectal Cancer

Manabu Yamamoto, Hiroaki Saito, Chihiro Uejima, Akimitsu Tanio, Yoichiro Tada, Tomoyuki Matsunaga, Teruhisa Sakamoto, Soichiro Honjo, Keigo Ashida, Yoshiyuki Fujiwara