RT Journal Article SR Electronic T1 Periodontitis and Premature Death: A Longitudinal, Prospective Clinical Trial JF American Dental Hygienists Association JO J Dent Hyg FD American Dental Hygienists Association SP 184 OP 185 VO 83 IS 4 A1 Birgitta Söder YR 2009 UL http://jdh.adha.org/content/83/4/184.abstract AB