PT - JOURNAL ARTICLE ED - , TI - DISCUSSION AID - 10.1136/sti.36.3.157 DP - 1960 Sep 01 TA - The British Journal of Venereal Diseases PG - 157--162 VI - 36 IP - 3 4099 - http://sti.bmj.com/content/36/3/157.short 4100 - http://sti.bmj.com/content/36/3/157.full SO - Br J Vener Dis1960 Sep 01; 36