Primary source data about the reasons underlying fellowship decisions are scarce. Most motivations have been imputed from surveys of residency choices by students. Frequently cited influences include intellectual and technical challenges, clinical problems treated, career opportunities, prestige, indebtedness, income, mentors, training duration, controllable lifestyles, clinical mastery, call schedule, family demands, and gender.3- 7 Few studies directly address resident choices. In one national, longitudinal, retrospective study of fellowship selections, female residents in 2005 disproportionately chose colorectal surgery, pediatric surgery, and surgical oncology. Potential effects of prestige, income, and mentors were inferred.1 A single-institution, retrospective survey of residency graduates identified intellectual appeal, clinical opportunities, and mentors as factors in fellowship decisions, regardless of gender. Women were less likely to undertake fellowships and more often considered lifestyle.10 In a national, prospective investigation of resident attrition conducted in 2008, 55% of respondents spread across all general surgery PGY levels perceived a need for fellowship training to be successful and 64% agreed that additional training was required to be competitive in the job market. Fellowship completion was associated with higher income by 78% and with a better lifestyle by 63%.16 Internal medicine residents also opt for subspecialization, with fellowship rates burgeoning from 46% in 1998 to 73% in 2003.17 A 2-institution, prospective, longitudinal study found that US medical graduate status, higher self-reported medical school class rank, lower indebtedness, and higher income expectations predicted fellowship pursuit after core internal medicine residency completion. Leisure time availability, workload demands, and stress were valued similarly by generalists and subspecialists.18