ACKNOWLEDGMENTS
We are grateful to Prof. Niwat Maneekarn and Assoc Prof. Pattara Khamrin
for reviewing the manuscript. This study was partially supported by
grants-in-aid from Research and Development Institute, Pibulsongkram
Rajabhat University, Thailand. The authors gratefully acknowledge
pediatric physicians, nurses, and assistants of Pediatric Unit,
Chiangrai Prachanukroh Hospital for stool specimen collection.