title: Design and analytical issues: a response to "long-term effects of tongue piercing--a case control study".
authors.forename: Chelsea
authors.initials: C
authors.lastname: Singleton
authors.forename: Gerald
authors.initials: G
authors.lastname: McGwin
mesh_terms: D046288:Body Piercing / Q000009:adverse effects*; D006801:Humans; D008297:Male