[1] Duke Univ, Duke Global Hlth Inst, Durham, NC USA
[2] UNICEF, Hlth Sect, New York, NY USA
[3] UNICEF, Immunizat Coverage & Equ, New York, NY USA
[4] Univ N Carolina, Enterprise Analyt & Data Sci, Hlth Care, Chapel Hill, NC 27515 USA
[5] Univ N Carolina, Div Practice Adv & Clin Educ, UNC Eshelman Sch Pharm, Chapel Hill, NC 27515 USA
[6] Univ N Carolina, Dept Maternal & Child Hlth, UNC Gillings Sch Global Publ Hlth, Chapel Hill, NC 27515 USA