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JAMA. 1931;97(19):1398-1399. doi:10.1001/jama.1931.02730190054021.
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Progress of Orthopedics  The twenty-sixth convention of the Deutsche orthopädische Gesellschaft, held in Berlin, September 14-16, was prolific in new ideas. The first day was devoted to the topic "The Theory of Hereditary Transmission in Relation to Orthopedics." Freiherr von Verschuer, director, department for the study of hereditary transmission, in the Kaiser-Wilhelm-Institut für Anthropologie in Dahlem, gave a survey of the new research in this field. Up to a few years ago, the conception was encountered in medicine that the irrefutable proof of the hereditary transmission lay in the recurrence of a parent's disease in the children. The rediscovery of the hereditary "laws" set up by Gregor Mendel has brought about a change in this conception. It is now known that a disease may be termed hereditary only when it has its essential causes in pathologic hereditary predispositions. In orthopedics, the investigations of Böhm of Berlin have shown that disorders


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