Hadley M.H.M.WoodHadley M.H.M., Jack S.J.S.ElderJack S.J.S., Cryptorchidism and testicular cancer: separating fact from fiction, „The Journal of Urology”, vol. 181 (2), 2009, s. 452–461, DOI: 10.1016/j.juro.2008.10.074, ISSN1527-3792, PMID: 19084853.
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Hadley M.H.M.WoodHadley M.H.M., Jack S.J.S.ElderJack S.J.S., Cryptorchidism and testicular cancer: separating fact from fiction, „The Journal of Urology”, vol. 181 (2), 2009, s. 452–461, DOI: 10.1016/j.juro.2008.10.074, ISSN1527-3792, PMID: 19084853.
Hadley M.H.M.WoodHadley M.H.M., Jack S.J.S.ElderJack S.J.S., Cryptorchidism and testicular cancer: separating fact from fiction, „The Journal of Urology”, vol. 181 (2), 2009, s. 452–461, DOI: 10.1016/j.juro.2008.10.074, ISSN1527-3792, PMID: 19084853.