title: Variability of syphilitic chancres.
mesh_terms: D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D002601:Chancre / Q000473:pathology*; D006801:Humans; D008297:Male; D013587:Syphilis / Q000188:drug therapy / Q000473:pathology*
chemical_list: D000900:Anti-Bacterial Agents