Methods are changing rapidly

Abstract
References 1.↵ Schroder FH . Detection of prostate cancer.BMJ 1995;310: 140–1. (21 January.) 2.↵ Wilson JMG, Jungner G .Principles and practice of screening for disease. Geneva: World Health Organisation, 1968. 3.↵ Christensson A, Bjork T, Nilsson O, Dahlen U, Matikainen M-T, Cockett ATK, et al . Serum prostate specific antigen complexed to alpha-1-antichymotrypsin as an indicator of prostate cancer.J Urol 1993;150:100–5. 4.↵ Catalona WJ, Richie JP, Ahmann FR, Hudson MA, Scardinoa PT, Flanigan RC, et al . Comparison of digital rectal examination and serum prostate specific antigen in the early detection of prostate cancer: results of a multicentre clinical trial of 6,630 men.J Urol 1994;151:1283–90.