[1] Yale Univ, Sch Publ Hlth, Dept Chron Dis Epidemiol, New Haven, CT 06520 USA
[2] York Univ, Schulich Sch Business, Accounting, Toronto, ON, Canada
[3] Yale Univ, Sch Med, COPPER Ctr, New Haven, CT 06520 USA
[4] Yale Canc Ctr, New Haven, CT USA
[5] Yale Univ, Sch Med, Dept Internal Med, Med & Epidemiol, New Haven, CT 06520 USA