Goswami ND, Hecker EJ, Vickery C, Ahearn MA, Cox GM, Holland DP, Naggie S, Piedrahita C, Mosher A, Torres Y, Norton BL, Suchindran S, Park PH, Turner D, Stout JE. Geographic information system-based screening for TB, HIV, and syphilis (GIS-THIS): a cross-sectional study. PLoS One. 2012; 7(10):e46029.