Richard C. Johnston, M.D. evaluator and practitioner of hip surgery.
Callaghan
J J
JJ
D006622:Hip Prosthesis / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D007484:Iowa; D009985:Orthopedics / Q000266:history; D012955:Societies, Medical / Q000266:history