1. Child Health Research Foundation, Department of Microbiology, Dhaka Shishu Hospital, Dhaka, Bangladesh;
2. Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Centre, Rotterdam, The Netherlands;
3. Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University, Stanford, California;
4. Enteric Infections, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam;
5. Bangladesh Institute of Child Health, Dhaka Shishu Hospital, Dhaka, Bangladesh