World Health Organization Consensus Committee recommendations concerning the diagnosis of BPH.

The expert committees, which met in Paris in June 1991 under the patronage of WHO to establish a consensus concerning BPH, adopted the recommendations summarised in this report. Despite certain criticisms which can be made, these recommendations offer the advantage of simplicity and uniformity, thereby constituting a "universal language". This will facilitate comparison of patients and therapeutic results, both in everyday practice and in the course of clinical trials. These recommendations will be periodically re-evaluated in the light of clinical experience and technological progress.

Published by Progres en urologie : journal de l'Association francaise d'urologie et de la Societe francaise d'urologie, 1991. The guideline itself is at the source linked here.

pubmed.ncbi.nlm.nih.gov/1726946/