PT - JOURNAL ARTICLE AU - Jianjun Qiao AU - Hong Fang TI - Syphilitic chancre of the mouth AID - 10.1503/cmaj.110664 DP - 2011 Nov 22 TA - Canadian Medical Association Journal PG - 2015--2015 VI - 183 IP - 17 4099 - http://www.cmaj.ca/content/183/17/2015.short 4100 - http://www.cmaj.ca/content/183/17/2015.full SO - CMAJ2011 Nov 22; 183