[1] Harvard Univ, Sch Med, Ctr Biomed Informat, SMART Project, Boston, MA 02115 USA
[2] Univ Texas Sch Dent, Houston, TX USA
[3] Harvard Univ, Sch Dent Med, Oral Hlth Policy & Epidemiol Dept, Boston, MA 02115 USA
[4] Univ Calif San Francisco, Sch Dent, Div Biomat & Bioengn, San Francisco, CA USA
[5] Univ Calif San Francisco, Sch Dent, Dept Prevent & Restorat Dent Sci, San Francisco, CA USA
[6] Harvard Univ, Sch Dent Med, Dept Oral Hlth Policy & Epidemiol, Boston, MA 02115 USA
[7] Harvard Univ, Sch Dent Med, Boston, MA 02115 USA