TY - JOUR T1 - DISCUSSION JF - The British Journal of Venereal Diseases JO - Br J Vener Dis SP - 7 LP - 11 DO - 10.1136/sti.29.1.7 VL - 29 IS - 1 A2 - , Y1 - 1953/03/01 UR - http://sti.bmj.com/content/29/1/7.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -