The NDP Operations Research team under DHMT, supported by Horizons and based at Hope Humana, was responsible for the day-to-day operation of the study. This team consisted of the late Hilda Kaunda, study coordinator; Queen Moyowanyambe, research assistant; Stephanie Mpabalwani, assistant study coordinator; Mary Mufaya, research assistant; Elizabeth Nonde, research assistant; Jennifer Ntinda, study secretary and qualitative data entry; Esther Sakala, study coordinator; and Kedrick Sikaona and Lenganje Sikaona, quantitative data entry. The following consultants provided technical assistance to the operations research team on behalf of Horizons: Cecelia Dadian; Fred Kaona; Rosemary Musonda, Tropical Diseases Research Centre; David.