Open Access Macedonian Journal of Medical Sciences; Vol 6 No 8 (2018): Aug 20 (OAMJMS); 1349-1353 Open Access Macedonian Journal of Medical Sciences Open Access Macedonian Journal of Medical Sciences; Vol 6, No 8 (2018): Aug 20 (OAMJMS); 1349-1353 Open Access Macedonian Journal of Medical Sciences, Vol 6, Iss 8 (2018)