title: A tale of two callings.
authors.affiliation: Howard Hughes Medical Institute, Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA. lefko001@receptor-biol.duke.edu.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Lefkowitz
mesh_terms: D001363:Awards and Prizes; D035843:Biomedical Research / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century; D012955:Societies, Medical; D014481:United States