MacPherson, P; Choko, AT; Webb, EL; Thindwa, D; Squire, SB; Sambakunsi, R; van Oosterhout, JJ; Chunda, T; Chavula, K; Makombe, SD; +2 more... Lalloo, DG; Corbett, EL; (2013) Development and Validation of a Global Positioning Systembased Map Book System for Categorizing Cluster Residency Status of Community Members Living in High-Density Urban Slums in Blantyre, Malawi. American journal of epidemiology, 177 (10). pp. 1143-1147. ISSN 0002-9262 DOI: https://doi.org/10.1093/aje/kws376