Inhibin B as a Serum Marker of Spermatogenesis: Correlation to Differences in Sperm Concentration and Follicle-Stimulating Hormone Levels. A Study of 349 Danish Men<sup>1</sup>Tina Kold Jensen, Niels E. Skakkebæk, Niels Henrik Hjøllund et al.|The Journal of Clinical Endocrinology & Metabolism|1997Cited by 300