Sugunan A P, Roy Subarna, Murhekar M V, Naik T N, Sehgal S C
Regional Medical Research Centre, Indian Council of Medical Research, Post Bag No.13, Port Blair-744101, Andaman and Nicobar Islands, India.
J Public Health (Oxf). 2007 Dec;29(4):449-50. doi: 10.1093/pubmed/fdm054. Epub 2007 Aug 31.