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Welzl-Hinterkörner E, Thölen H, Stürmer J, Opravil M, Bernauer W.Welzl-Hinterkörner E, et al. Among authors: sturmer j.Ophthalmologe. 1999 Feb;96(2):87-91. doi: 10.1007/s003470050380.Ophthalmologe. 1999.PMID: 10095354German.