[1] Columbia Univ, New York, NY USA
[2] Univ Complutense Madrid, Madrid, Spain
[3] Ege Univ, Izmir, Turkey
[4] Univ Birmingham, Birmingham, W Midlands, England
[5] Univ Guarulhos, Guarulhos, Brazil
[6] Rutgers State Univ, Newark, NJ USA
[7] Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China
[8] Boston Univ, Boston, MA 02215 USA
[9] Univ Michigan, Ann Arbor, MI 48109 USA
[10] Univ Pisa, Pisa, Italy
[11] Univ Louisville, Louisville, KY 40292 USA
[12] Univ Bonn, Bonn, Germany
[13] Univ Penn, Philadelphia, PA 19104 USA
[14] SUNY Buffalo, Buffalo, NY USA
[15] Greifswald Univ, Greifswald, Germany
[16] Ohio State Univ, Columbus, OH 43210 USA
[17] Univ Amsterdam, Acad Ctr Dent ACTA, Amsterdam, Netherlands
[18] Vrije Univ Amsterdam, Amsterdam, Netherlands
[19] Rambam Hlth Care Campus, Haifa, Israel
[20] Israel Inst Technol, Haifa, Israel
[21] Peking Univ, Beijing, Peoples R China
[22] Univ Geneva, Geneva, Switzerland
[23] UCL, London, England
[24] Univ N Carolina, Chapel Hill, NC 27515 USA
[25] Univ Queensland, Brisbane, Qld, Australia