title: Observations on anorectal suppuration.
mesh_terms: D000038:Abscess / Q000453:epidemiology*; D000293:Adolescent; D000328:Adult; D000368:Aged; D001004:Anus Diseases / Q000453:epidemiology*; D002648:Child; D003248:Constipation / Q000209:etiology; D005006:Ethnicity; D005260:Female; D006452:Hemoglobinometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D009892:Opium / Q000009:adverse effects; D012002:Rectal Diseases / Q000453:epidemiology*; D012003:Rectal Fistula / Q000453:epidemiology; D012189:Retrospective Studies; D012846:Singapore; D013492:Suppuration / Q000453:epidemiology
chemical_list: D009892:Opium