How hard are you working?
Terry
Ken
K
D000328:Adult; D000368:Aged; D003625:Data Collection; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D008511:Medicine / Q000145:classification; D008875:Middle Aged; D010820:Physicians; D013038:Specialization; D014481:United States; D016526:Workload / Q000706:statistics & numerical data*