Open Access Macedonian Journal of Medical Sciences, Vol 6, Iss 4, Pp 659-662 (2018) Open Access Macedonian Journal of Medical Sciences Open Access Macedonian Journal of Medical Sciences; Vol 6 No 4 (2018): Apr 15 (OAMJMS); 659-662 Open Access Macedonian Journal of Medical Sciences; Vol 6, No 4 (2018): Apr 15 (OAMJMS); 659-662