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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Study flow chart. This figure shows the timeline for randomization, study visits, and the introduction time points of complementary food for early and late study group. The content of feeding boxes is represented by symbols for nutrient groups.