[1] Univ Oxford, Dept Social Policy & Intervent, Barnett House,32 Wellington Sq, Oxford OX1 2ER, England
[2] Yale Sch Med, Ctr Child Study, 40 Temple St,Suite 6B, New Haven, CT USA
[3] Natl Diaper Bank Network, 155 East St,Suite 101, New Haven, CT USA
[4] Diaper Bank, POB 9017, New Haven, CT USA
[5] Yale Sch Med, Dept Psychiat, New Haven, CT USA
[6] Yale Sch Publ Hlth, Dept Chron Dis Epidemiol, New Haven, CT USA