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Schäfers HJ, Haverich A, Cremer J, Jurmann M, Alken A, Hamm M, Borst HG.Schäfers HJ, et al. Among authors: hamm m.Chirurg. 1990 Apr;61(4):292-6.Chirurg. 1990.PMID: 2189711German.
Hoeper MM, Hamm M, Schäfers HJ, Haverich A, Wagner TO.Hoeper MM, et al. Among authors: hamm m.Chest. 1992 Sep;102(3):864-70. doi: 10.1378/chest.102.3.864.Chest. 1992.PMID: 1325340
Wagner TO, Höper MM, Hamm M, Fabel H.Wagner TO, et al. Among authors: hamm m.Verh Dtsch Ges Inn Med. 1990;96:476-83.Verh Dtsch Ges Inn Med. 1990.PMID: 2092468Review.German.No abstract available.