The co-authors thank Edward Mills and David Price for providing edits and feedback on the manuscript and the Strategic Analysis, Research, and Training Center (START) at the University of Washington for funding the original research.
Black RE et al.Maternal and Child Nutrition Study Group 2013. Maternal and child undernutrition and overweight in low-income and middle-income countries. Lancet 382: 427–451.
Bhutta ZA, Das JK, Rizvi A, Gaff MF, Walker N, Horton S, Webb P, Lartey A, Black RE, 2013. Evidence-based interventions for improvement of maternal and child nutrition: what can be done and at what cost? Lancet 382: 452–477.
Taylor-Robinson DC, Maayan N, Soares-Weiser K, Donegan S, Garner P, 2012. Deworming drugs for soil-transmitted intestinal worms in children: effects on nutritional indicators, haemoglobin and school performance. Cochrane Database Syst Rev 11: CD000371.
Stampfer MJ, Buring JE, Willett W, Rosner B, Eberlein K, Hennekens CH, 1985. The 2 × 2 factorial design: its application to a randomized trial of aspirin and carotene in U.S. physicians. Stat Med 4: 111–116.
Mills EJ, Thorlund K, Ioannidis JP, 2012. Calculating additive treatment effects from multiple randomized trials provides useful estimates of combination therapies. J Clin Epidemiol 65: 1282–1288.
Habicht JP, Martorell R, Rivera JA, 1995. Nutritional impact of supplementation in the INCAP longitudinal study: analytic strategies and inferences. J Nutr 125: 1042S–1050S.
Rivera JA, Hotz C, Gonzalez-Cossio T, Neufeld L, Garcia-Guerra A, 2003. The effect of micronutrient deficiencies on child growth: a review of results from community-based supplementation trials. J Nutr 133: 4010S–4020S.
Mora JO, Herrera MG, Suescun J, de Navarro L, Wagner M, 1981. The effects of nutritional supplementation on physical growth of children at risk of malnutrition. Am J Clin Nutr 34: 1885–1892.
Mills EJ, Gardner D, Thorlund K, Briel M, Bryan S, Hutton B, Guyatt GH, 2014. A users’ guide to understanding therapeutic substitutions. J Clin Epidemiol 67: 305–313.
Ayoya MA, Spiekermann-Brouwer GM, Traore AK, Stoltzfus RJ, Habicht JP, Garza C, 2009. Multiple micronutrients including iron are not more effective than iron alone for improving hemoglobin and iron status of Malian school children. J Nutr 139: 1972–1979.
Lonnerdal B, 2004. Interactions between micronutrients: synergies and antagonisms. Pettifor JM, Zlotkin S, eds. Neslé Nutrition Workshop Series Pediatric Program Volume 54: Micronutrient Deficiencies During the Weaning Period and the First Years of Life. Basel, Switzerland: Nestle Nutrition.
Mayo-Wilson E, Junior J, Imdad A, Dean S, Xhs C, Es C, Jaswal A, Bhutta Z, 2014. Zinc supplementation for preventing mortality, morbidity, and growth failure in children aged 6 months to 12 years of age. Cochrane Database Syst Rev 5: CD009384.
Rahman MM, Tofail F, Wahed MA, Fuchs GJ, Baqui AH, Alvarez JO, 2002. Short-term supplementation with zinc and vitamin A has no significant effect on the growth of undernourished Bangladeshi children. Am J Clin Nutr 75: 87–91.
Berger J, Ninh NX, Khan NC, Nhien NV, Lien DK, Trung NQ, Khoi HH, 2006. Efficacy of combined iron and zinc supplementation on micronutrient status and growth in Vietnamese infants. Eur J Clin Nutr 60: 443–454.
Dijkhuizen MA, Winichagoon P, Wieringa FT, Wasantwisut E, Utomo B, Ninh NX, Hidayat A, Berger J, 2008. Zinc supplementation improved length growth only in anemic infants in a multi-country trial of iron and zinc supplementation in south-east Asia. J Nutr 138: 1969–1975.
Fahmida U, Rumawas JS, Utomo B, Patmonodewo S, Schultink W, 2007. Zinc-iron, but not zinc-alone supplementation, increased linear growth of stunted infants with low haemoglobin. Asia Pac J Clin Nutr 16: 301–309.
Yang YX, Han JH, Shao XP, He M, Bian LH, Wang Z, Wang GD, Men JH, 2002. Effect of micronutrient supplementation on the growth of preschool children in China. Biomed Environ Sci 15: 196–202.
Jumbe NL, Murray JC, Kern S, 2016. Data sharing and inductive learning—toward healthy birth, growth, and development. N Engl J Med 374: 2415–2417.