Table 1.

Sample information of the RF and control group.

Sample information	RF	HC	All
Sample size	27	27	54
Gender
Female	5	13	18
Male	22	14	36
Age
<20	0	0	0
20–29	2	2	4
30–39	7	7	14
40–49	8	8	16
50–59	6	7	13
≥60	4	3	7