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Ludwig M, Finas DF, al-Hasani S, Diedrich K, Ortmann O.Ludwig M, et al. Among authors: finas df.Hum Reprod. 1999 Feb;14(2):354-8. doi: 10.1093/humrep/14.2.354.Hum Reprod. 1999.PMID: 10099978