TY - JOUR T1 - Dental Hygiene Research Center Old Dominion University JF - American Dental Hygienists Association JO - J Dent Hyg SP - 48 LP - 48 VL - 81 IS - 2 AU - Gayle McCombs Y1 - 2007/04/01 UR - http://jdh.adha.org/content/81/2/48.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -