RT Journal Article SR Electronic T1 An Update from Northwest PRECEDENT (Practice-based REsearch Collaborative in Evidence-based DENTistry) JF American Dental Hygienists Association JO J Dent Hyg FD American Dental Hygienists Association SP 169 OP 170 VO 83 IS 4 A1 Rothen, Marilynn YR 2009 UL http://jdh.adha.org/content/83/4/169.abstract AB