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Gutberlet M, Abdul-Khaliq H, Stobbe H, Fröhlich M, Spors B, Knollmann F, Lange P, Hetzer R, Felix R.Gutberlet M, et al. Among authors: knollmann f.Z Kardiol. 2001;90 Suppl 6:2-12.Z Kardiol. 2001.PMID: 11826817German.
Schedel H, Knollmann FD, Granrath M, Südkamp N, Siekmann R, Felix R.Schedel H, et al. Among authors: knollmann fd.Rontgenpraxis. 1995 Sep;48(9):247-51.Rontgenpraxis. 1995.PMID: 7482043German.No abstract available.