TY - JOUR T1 - Primary and secondary syphilis. Country of origin study, 1969. British Cooperative Clinical Group. JF - The British Journal of Venereal Diseases JO - Br J Vener Dis SP - 477 LP - 484 DO - 10.1136/sti.46.6.477 VL - 46 IS - 6 A2 - , Y1 - 1970/12/01 UR - http://sti.bmj.com/content/46/6/477.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -