Hans Kehr: not first, but foremost.
Morgenstern
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Department of Surgery, Cedars-Sinai Research Institute, Cedars-Sinai Medical Center, UCLA School of Medicine 90048-1869.
D002763:Cholecystectomy / Q000266:history*; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans