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Krämer M, Höltermann W, Lukasewitz P, van Wickern M, Walthers EM, Lennartz H.Krämer M, et al. Among authors: lennartz h.Pneumologie. 1994 Oct;48(10):765-8.Pneumologie. 1994.PMID: 7808992German.
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Wichert A, Bittersohl J, Lukasewitz P, Ernst M, Lennartz H.Wichert A, et al. Among authors: lennartz h.Anasthesiol Intensivmed Notfallmed Schmerzther. 1999 Nov;34(11):678-83. doi: 10.1055/s-1999-225.Anasthesiol Intensivmed Notfallmed Schmerzther. 1999.PMID: 10609040Clinical Trial.German.