Table 1.

The description of research participants.

	Research subjects	Control group
Gender [n (%)]
Male	59 (66)	19 (63)
Female	31 (34)	11 (37)
Age (yr)
Range	18–66	21–55
Average	39.9	35.5
Course (yr)
Range	0.5–30	0.5–12
Average	1	1.5