PT - JOURNAL ARTICLE AU - Diane J. Lu AU - Ariella Zbar TI - Atypical presentation of syphilis as an aphthous ulcer AID - 10.1503/cmaj.161197 DP - 2017 May 29 TA - Canadian Medical Association Journal PG - E748--E748 VI - 189 IP - 21 4099 - http://www.cmaj.ca/content/189/21/E748.short 4100 - http://www.cmaj.ca/content/189/21/E748.full SO - CMAJ2017 May 29; 189