Friedrich, M. N. D., Kappler, A., & Mosler, H. J. (2018). Enhancing handwashing frequency and technique of primary caregivers in Harare, Zimbabwe: a cluster-randomized controlled trial using behavioral and microbial outcomes. Social Science and Medicine, 196, 66-76. https://doi.org/10.1016/j.socscimed.2017.10.025