title: For free PSA, it's all in the numbers.
authors.forename: W A
authors.initials: WA
authors.lastname: Check
mesh_terms: D006801:Humans; D007118:Immunoassay; D008297:Male; D017430:Prostate-Specific Antigen / Q000097:blood*; D011470:Prostatic Hyperplasia / Q000175:diagnosis; D011471:Prostatic Neoplasms / Q000175:diagnosis*