[1] ClearChoice Dent Implant Ctr, Cleveland, OH USA
[2] Case Western Reserve Univ, Sch Dent Med, Cleveland, OH 44106 USA
[3] W Virginia Univ, Sch Dent, Dept Prosthodont, Morgantown, WV 26506 USA
[4] Univ Washington, Dept Periodont, Seattle, WA 98195 USA