[1] Univ Michigan, Sch Dent, Dept Oral & Maxillofacial Surg, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Sch Dent, Dept Periodont & Oral Med, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Sch Dent, Dept Cariol, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Sch Dent, Dept Restorat Sci, Ann Arbor, MI 48109 USA
[5] Univ Michigan, Sch Dent, Dept Endodont, Ann Arbor, MI 48109 USA
[6] Natl & Kapodistrian Univ Athens, Metropolitan Hosp, Dept Hist & Philosophy Med, Athens, Greece
[7] Natl & Kapodistrian Univ Athens, Metropolitan Hosp, Dept Oral & Maxillofacial Surg, Sch Med, Athens, Greece
[8] Natl & Kapodistrian Univ Athens, Metropolitan Hosp, Sch Dent, Athens, Greece
[9] Univ Michigan, Res & Informat, Taubman Hlth Sci Lib, Ann Arbor, MI 48109 USA
[10] Univ Michigan, Med Sch, Dept Learning Hlth Sci, Ann Arbor, MI 48109 USA