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Lass M, Oertel F, Welz A, Hannekum A.Lass M, et al. Among authors: welz a.Vasa Suppl. 1992;35:72-3.Vasa Suppl. 1992.PMID: 1481068German.No abstract available.
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Welz A, Stadtmüller A, Schäffer U, Strohschneider T, Hannekum A.Welz A, et al.Thorac Cardiovasc Surg. 1991 Dec;39 Suppl 3:236-40. doi: 10.1055/s-2007-1020027.Thorac Cardiovasc Surg. 1991.PMID: 1803636
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Lass M, Kiefer H, Welz A, Kinzl L, Rübenacker F, Hannekum A.Lass M, et al. Among authors: welz a.Unfallchirurg. 1993 Dec;96(12):618-24.Unfallchirurg. 1993.PMID: 8128254German.