A Babu Rs1, T Jones2, J Harvey3. 1. Dentistry Programme, Faculty of Medical Sciences, The University of the West Indies, Kingston 7, Jamaica, West Indies. arvindbabu.rajendrasantosh@uwimona.edu.jm. 2. Dentistry Programme, Faculty of Medical Sciences, The University of the West Indies, Kingston 7, Jamaica, West Indies. 3. Department of Periodontology, School of Dentistry, Meharry Medical College, Nashville, Tennessee, USA.