Open Access Macedonian Journal of Medical Sciences; Vol 6 No 2 (2018): Feb 15 (OAMJMS); 242-247 Open Access Macedonian Journal of Medical Sciences, Vol 6, Iss 2, Pp 242-247 (2018) Open Access Macedonian Journal of Medical Sciences; Vol 6, No 2 (2018): Feb 15 (OAMJMS); 242-247