Survey data from the ASH In-Service Exam for hematology and hematology/oncology fellows, 2010-2016. (A) Anticipated percentage of eventual career practice comprised by hematology versus oncology. (B) Anticipated primary career focus. (C) Timing of when fellows made decisions to pursue careers in hematology and oncology. (D) Most critical factor in making decisions about choice of subspecialty. (E) Anticipated employment settings after completion of fellowship (asterisk [*] denotes missing data for years 2011 and 2012).