Comparison of text messaging data collection vs face-to-face interviews for public health surveys : a cluster randomized crossover study of care-seeking for childhood pneumonia and...

由 van Velthoven, Michelle Helena, Wang, Wei, Wu, Qiong, Li, Ye, Scherpbier, Robert W, Du, Xiaozhen, Chen, Li, Zhang, Yanfeng, Car, Josip, Rudan, Igor
出版 2018