[1] Boston Univ, Henry M Goldman Sch Dent Med, Dept Periodontol & Oral Biol, CABR, Boston, MA 02118 USA
[2] Univ Western Ontario, Dept Biochem, Schulich Sch Med & Dent, London, ON, Canada
[3] Forsyth Inst, Dept Biomineralizat, Boston, MA USA
[4] Univ Sao Paulo, Fac Dent, Dept Pediat Dent, BR-05508 Sao Paulo, Brazil