Dean, John Diagnosing secondary hypogonadism: important consequences for fertility and reversibility. [electronic resource] - BJU international Apr 2016 - 552-4 p. digital Publication Type: Letter ISSN: 1464-410X Standard No.: 10.1111/bju.13316 doi Subjects--Topical Terms: AdultAgedHumansHypogonadism--diagnosisInfertility, Male--etiologyLuteinizing Hormone--metabolismMaleMiddle AgedTestosterone--deficiency