1. Division of Academic General Pediatrics, Child Development and Community Health, UC San Diego, CA 92093-0927, USA
2. Center for Human Growth and Development, University of Michigan, Ann Arbor, MI 48109-5406, USA
3. Institute of Nutrition and Food Technology (INTA), University of Chile, El Líbano 5524, 138-11 Santiago, Chile
4. Department of Pediatrics, Catholic University of Chile, Avenida Libertador General Bernardo O'Higgins 340, Santiago, Chile
5. Department of Clinical Epidemiology, Biostatistics and Bioinformatics and Department of Obstetrics and Gynecology, Amsterdam Academic Medical Center, 1105 AZ Amsterdam, The Netherlands