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- [43] Korean Society for Reproductive Medicine 50th anniversary commemorative address CLINICAL AND EXPERIMENTAL REPRODUCTIVE MEDICINE-CERM, 2022, 49 (02): : 75 - 75
- [47] REPORT ON 50TH ANNUAL CONGRESS OF SWISS SOCIETY OF DERMATOLOGY AND VENEREOLOGY ON 21 AND 22 SEPTEMBER 1968 IN GENEVA HAUTARZT, 1969, 20 (09): : 426 - &
- [48] 115th Congress of the German Society of Internal Medicine GASTROENTEROLOGE, 2008, 3 (04): : 354 - 354
- [49] 8th Congress of the German Society for Palliative Medicine ZEITSCHRIFT FUR PALLIATIVMEDIZIN, 2010, 11 (05):