1. From the Medical Research Council Childhood Nutrition Research Centre (A.S., M.F., K.K., A.L.) and Centre for Pediatric Epidemiology and Biostatistics (T.J.C.), Institute of Child Health, London; Academic Division of Child Health, University Hospital, Nottingham (T.S.); and Leicester General Hospital National Health Service Trust, Gwendolen Road, Leicester (A.E.-J.), UK.