Open Access Macedonian Journal of Medical Sciences; Vol. 4 No. 1 (2016): Mar 15 (OAMJMS); 9-16 Open Access Macedonian Journal of Medical Sciences; Vol 4, No 1 (2016): Mar 15 (OAMJMS); 9-16 Open Access Macedonian Journal of Medical Sciences Open Access Macedonian Journal of Medical Sciences, Vol 4, Iss 1, Pp 9-16 (2016)