KLK3 and prostate carcinoma: Filella Filella X X Alcover Alcover J J Molina Molina R R Rodríguez Rodríguez A A Carretero Carretero P P Ballesta Ballesta AM AM Free and total PSA in the diagnosis of prostate cancer Free and total PSA in the diagnosis of prostate cancer Tumor Biol Tumor Biol 1997 1997 18 18 332 332 40 40 10.1159/000218047 10.1159/000218047