Open Access Macedonian Journal of Medical Sciences, Vol 2, Iss 4, Pp 650-654 (2014) Open Access Macedonian Journal of Medical Sciences; Vol 2, No 4 (2014): Dec 15 (OAMJMS); 650-654 Open Access Macedonian Journal of Medical Sciences; Vol. 2 No. 4 (2014): Dec 15 (OAMJMS); 650-654