Preoperative Cardiopulmonary Exercise Test Associated with Postoperative Outcomes in Patients Undergoing Cancer Surgery: A Systematic Review and Meta-Analyses Daniel Steffens, Hilmy Ismail, Linda Denehy, Paula R. Beckenkamp, Michael Solomon, Cherry Koh, Jenna Bartyn, Neil Pillinger Annals of Surgical Oncology.2021; 28(12): 7120. CrossRef