Challenge and response. Presidential address.
D005075:Biological Evolution; D003153:Community Health Services; D004503:Education, Medical, Graduate; D004777:Environment; D006176:Gynecology / Q000193:education; D006801:Humans; D007396:Internship and Residency; D007883:Legislation, Medical; D008483:Medical Assistance; D006278:Medicare; D008511:Medicine; D009774:Obstetrics / Q000193:education; D012041:Regional Medical Programs; D013038:Specialization; D013312:Stress, Physiological; D014481:United States