title: Reader's comment.
authors.forename: Younis Abed A L-Wahhab M
authors.initials: YA
authors.lastname: Skaik
mesh_terms: D000017:ABO Blood-Group System / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D010510:Periodontal Diseases / Q000097:blood*; D012204:Rh-Hr Blood-Group System / Q000032:analysis*
chemical_list: D000017:ABO Blood-Group System; D012204:Rh-Hr Blood-Group System