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SimonS.ChangSimonS., AnneA.SkakkebækAnneA., Claus HøjbjergC.H.GravholtClaus HøjbjergC.H., Klinefelter Syndrome and medical treatment: hypogonadism and beyond, „Hormones (Athens, Greece)”, 14 (4), 2015, s. 531–548, DOI: 10.14310/horm.2002.1622, ISSN2520-8721, PMID: 26732150 [dostęp 2018-06-17].
RyanR.FlanniganRyanR., PremalP.PatelPremalP., Darius A.D.A.PaduchDarius A.D.A., Klinefelter Syndrome. The Effects of Early Androgen Therapy on Competence and Behavioral Phenotype, „Sexual Medicine Reviews”, 2018, DOI: 10.1016/j.sxmr.2018.02.008, ISSN2050-0521, PMID: 29680294 [dostęp 2018-06-17].