[1] Ludwig Maximilians Univ Munchen, Dept Conservat Dent & Periodontol, Univ Hosp, Goethestr 70, D-80336 Munich, Germany
[2] Univ Oulu, Dept Cariol Endodontol & Paediat Dent, Res Unit Oral Hlth Sci, Oulu, Finland
[3] Oulu Univ Hosp, Med Res Ctr, Oulu, Finland
[4] Univ Oulu, Oulu, Finland
[5] Natl Univ Singapore, Fac Dent, Singapore, Singapore
[6] Univ Ghent, Dept Paediat Dent, PaeCoMeDiS Res Cluster, Ghent, Belgium
[7] Specialized Dent Practice, Warsaw, Poland
[8] Univ Basel, Dept Orthodont & Paediat Dent, Basel, Switzerland
[9] Univ Western Australia, Div Oral Diagnost & Surg Sci, Perth, Australia
[10] Univ Manchester, Manchester Acad Hlth Sci Ctr, Fac Biol Med & Hlth, Div Dent,Sch Med Sci, Manchester, Lancs, England
[11] Natl & Kapodistrian Univ Athens, Dept Oral Diag & Radiol, Athens, Greece