title: Letter to the editor: Authors' response.
authors.affiliation: School of Dental Medicine, Boston University, Boston, Massachusetts.
authors.forename: Nathan
authors.initials: N
authors.lastname: Ng
authors.forename: Elizabeth Krall
authors.initials: EK
authors.lastname: Kaye
authors.forename: Raul I
authors.initials: RI
authors.lastname: Garcia
mesh_terms: D003069:Coffee; D006801:Humans; D008297:Male; D010510:Periodontal Diseases / Q000517:prevention & control*
chemical_list: D003069:Coffee