Response to letters to the editor regarding our paper "Early introduction of complementary foods and childhood overweight in breastfed and formula-fed infants in the Netherlands: the PIAMA birth cohort study"
1 Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, STR 6.131, P.O. Box 85500, 3508 GA, Utrecht, The Netherlands. l.p.m.pluymen@umcutrecht.nl.
2 Center for Nutrition, Prevention, and Health Services, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.
3 Institute for Risk Assessment Sciences, Division of Environmental Epidemiology, Utrecht University, Utrecht, The Netherlands.
4 Department of Pediatric Pulmonology and Pediatric Allergology, UMCG, GRIAC Research Institute, Groningen, University of Groningen, Beatrix Children's Hospital, Utrecht, The Netherlands.
5 Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, STR 6.131, P.O. Box 85500, 3508 GA, Utrecht, The Netherlands.