History always lends perspective.
Department of Prevention and Community Health, School of Public Health and Health Services, George Washington University, Washington, USA.
James F
JF
Cawley
D049673:History, 20th Century; D006801:Humans; D009722:Nurse Practitioners / Q000193:education / Q000266:history*; D010823:Physician Assistants / Q000193:education / Q000266:history*; D014481:United States