AN EXAMINATION OF SELF-CARE PRACTICES AMONG DIABETES MELLITUS PATIENTS IN DIABETIC CLINIC AT THE TEACHING HOSPITAL, PERADENIYA E. M. M. G. N. Kumari, P. S. P. Balasooriya, P. K. G. M. Palamakumbura, A. V. P. Madhavi and W.G.N. Isurudisi