It is widely acknowledged that prostate specific antigen (PSA) testing can lead to false-positives, overdiagnosis and overtreatment of prostate cancer. The current national clinical guidelines only recommend the test to a small group of patients and does not recommend neither systematic nor opportunistic screening for prostate cancer with the test. The aim of this cluster randomized trial is to evaluate the effectiveness of a complex intervention aimed at improving the use of evidence based practice when using prostate specific antigen tests in general practice. The complex intervention in this study is a so called cluster package which is meeting material to a quality cluster meeting as almost every general practitioner is a member of a quality cluster. Therefore, the investigators have developed a cluster package aimed at promoting an evidence-based use of the prostate specific antigen test to general practitioners.