TY - JOUR A1 - Labrique, A. A1 - Blynn, E. A1 - Ahmed, S. A1 - Gibson, D. A1 - Pariyo, G. A1 - Hyder, A.A. T1 - Health surveys using mobile phones in developing countries: Automated active strata monitoring and other statistical considerations for improving precision and reducing biases Y1 - 2017 DO - 10.2196/jmir.7329 VL - 19 IS - 5 ER -