TY - JOUR T1 - Atypical presentation of syphilis as an aphthous ulcer JF - Canadian Medical Association Journal JO - CMAJ SP - E748 LP - E748 DO - 10.1503/cmaj.161197 VL - 189 IS - 21 AU - Diane J. Lu AU - Ariella Zbar Y1 - 2017/05/29 UR - http://www.cmaj.ca/content/189/21/E748.abstract N2 - ER -