SMS text message reminders to improve infant vaccination coverage in Guatemala: A pilot randomized controlled trial.
Domek GJ, Contreras-Roldan IL, O'Leary ST, Bull S, Furniss A, Kempe A, Asturias EJ. SMS text message reminders to improve infant vaccination coverage in Guatemala: A pilot randomized controlled trial. Vaccine. 2016 05 05; 34(21):2437-2443.