1Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA, USA
2Thailand Ministry of Public Health-US Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
3Lata Medical Research Foundation, Nagpur, India
4Datta Meghe Institute of Medical Sciences, Wardha, India
5Abt Associates, Atlanta, GA, USA
6Queen Sirikit National Institute of Child Health, Thailand Ministry of Public Health, Bangkok, Thailand
7US Naval Medical Research Unit No 6, Bellavista, Peru
8Dhruv Pathology and Molecular Diagnostics Lab, Nagpur, India
9Hospital Nacional Docente Madre Niño San Bartolomé, Lima, Peru
10Rollins School of Public Health, Emory University, Atlanta, GA, USA
11Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
12Hospital Nacional Arzobispo Loayza, Lima, Peru
13Instituto Nacional Materno Perinatal, Lima, Peru
14Rajavithi Hospital, Bangkok, Thailand