Table 1.

Distribution of participants according to risk groups.

Risk Group	Patients		Healthy Donors
	Novi Sad	Skopje	Novi Sad	Skopje
	Gender
Male	23	27	17	12
Female	28	18	45	34
Total	51	45	62	46
	Age
Children	13	5	0	0
Teenagers and adults	32	33	62	46
Seniors	6	7	0	0
Total	51	45	62	46