[1] Erasmus MC, Dept Epidemiol, NL-3000 CA Rotterdam, Netherlands
[2] Univ Ioannina, Sch Med, Dept Hyg & Epidemiol, GR-45110 Ioannina, Greece
[3] Fdn Res & Technol, Biomed Res Inst, Ioannina, Greece
[4] Tufts Univ, Sch Med, Dept Med, Boston, MA 02111 USA
[5] Tufts Med Ctr, Inst Clin Res & Hlth Policy Studies, Ctr Genet Epidemiol & Modeling, Boston, MA USA
[6] Tufts Med Ctr, Inst Clin Res & Hlth Policy Studies, Tufts CTSI, Boston, MA USA
[7] Stanford Univ, Sch Med, Stanford Prevent Res Ctr, Stanford, CA 94305 USA
[8] Univ Ottawa, Dept Epidemiol & Community Med, Ottawa, ON, Canada
[9] Ctr Dis Control & Prevent, Off Publ Hlth Genom, Atlanta, GA USA