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Lange C, Auw-Hädrich C, Böhringer D, Andres M, Loeffler KU, Reinhard T.Lange C, et al.Ophthalmologe. 2011 Jan;108(1):68-72. doi: 10.1007/s00347-010-2231-7.Ophthalmologe. 2011.PMID: 20803020German.