[1] Univ Hlth Network, Princess Margaret Canc Ctr, Toronto, ON, Canada
[2] Tohoku Univ, Thorac Surg, Inst Dev Aging & Canc, Sendai, Miyagi, Japan
[3] Univ Hlth Network, Princess Margaret Hosp, Toronto, ON, Canada
[4] Princess Margaret Canc Ctr, Div Med Oncol & Hematol, Toronto, ON, Canada