Acknowledgments
The authors would like to express our gratitude to all infants and their parents/guardians for their participation, Miss Pornpen Gamnarai (Faculty of Medicine, Thammasat University) for her technical assistance, and Prof. Somdet Srichairatanakool (Faculty of Medicine, Chiang Mai University) for his contribution on the analysis of iron-related parameters. The English language editing was done by Debra Kim Liwiski, an international instructor, Clinical Research Center, Faculty of Medicine, Thammasat University. The authors gratefully acknowledged the financial support provided by Thammasat University Research Fund under the TU research scholar, contract No. 2/67/2560. VV was supported by the Chalermprakiat Grant and Research Excellent Development (RED) program, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.