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Armauer Hansen Research Institute, Armauer Hansen Research Institute, - Nutrition and Clinical Services Division (NCSD), International Centre for Diarrheal Disease Research (icddr,b), International Centre for Diarrheal Disease Research (icddr,b), International Centre for Diarrheal Disease Research (icddr,b), International Centre for Diarrheal Disease Research (icddr,b), Armauer Hansen Research Institute, Armauer Hansen Research Institute, Armauer Hansen Research Institute, Government of Ethiopia - Newborn and Child Health Desk, Armauer Hansen Research Institute, Armauer Hansen Research Institute, Armauer Hansen Research Institute, Addis Ababa University - Black Lion Hospital, Addis Ababa University - College of Health Sciences, Addis Ababa University - Black Lion Hospital, St. Paul’s Hospital Millennium Medical College - Department of Pediatrics and Child Health, Yekatit 12 Teaching Hospital - Department of Pediatrics and Child Health, Childhood Acute Illness and Nutrition Network, - Nutrition and Clinical Services Division (NCSD), International Centre for Diarrheal Disease Research (icddr,b) and Childhood Acute Illness and Nutrition Network