Open Access Macedonian Journal of Medical Sciences, Vol 2, Iss 3, Pp 491-493 (2014) Open Access Macedonian Journal of Medical Sciences; Vol 2, No 3 (2014): Sep 15 (OAMJMS); 491-493 Open Access Macedonian Journal of Medical Sciences; Vol. 2 No. 3 (2014): Sep 15 (OAMJMS); 491-493