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Overlack A, Stumpe KO, Kühnert M, Kolloch R, Ressel C, Heck I, Krück F.Overlack A, et al. Among authors: kruck f.Klin Wochenschr. 1981 Jan 15;59(2):69-74. doi: 10.1007/BF01477285.Klin Wochenschr. 1981.PMID: 6163004
Overlack A, Stumpe KO, Heck I, Krück F.Overlack A, et al. Among authors: kruck f.Dtsch Med Wochenschr. 1980 Apr 11;105(15):505-9. doi: 10.1055/s-2008-1070696.Dtsch Med Wochenschr. 1980.PMID: 6244920Clinical Trial.German.