Affiliation: | (1) Helen Keller International, PO Box 369, Freetown, Sierra Leone;(2) Liverpool School of Tropical Medicine, Liverpool, UK;(3) National NTDCP, Ministry for Health and Sanitation, Freetown, Sierra Leone;(4) School of Community Health and Clinical Sciences, Njala University, Bo, Sierra Leone;(5) Helen Keller International, Regional Office for Africa, Dakar, Senegal |