Review of "Who Makes It to the End? A Novel Predictive Model for Identifying Surgical Residents at Risk for Attrition" by Yeo HL, Abelson JS, Mao J, Lewis F, Michelassi F, Bell R, Sedrakyan A, Sosa JA in Ann Surg 266: 499–507, 2017. Issue 2 (March 2018)