Low sperm counts in genitourinary medicine clinic attendees: results from a case–control study
Christopher A Carne, Sian Chilcott, Christopher Palmer, Oliver Green, Simeon Bridge, Richard Walsh, Anna Gramy-Mason, Maria O'Donovan
Sexually Transmitted Infections Oct 2012, 88 (6) 422-426; DOI: 10.1136/sextrans-2011-050310