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Byrne MM, Rolf C, Depenbusch M, Cooper TG, Nieschlag E.Byrne MM, et al. Among authors: cooper tg.Hum Reprod. 2003 Oct;18(10):2098-102. doi: 10.1093/humrep/deg416.Hum Reprod. 2003.PMID: 14507828Clinical Trial.