Table 1. Demographic data of the patients.

Patients	Sex	Symptom laterality predominance	Age (years)	Disease duration (years)
1	M	R	64	8
2	M	L	53	12
3	M	R	61	6
4	M	R	67	5
5	M	R	52	12
6	M	L	55	8
7	M	L	58	8
8	M	L	51	8
9	M	L	69	14
10	F	L	65	15
11	M	L	58	9
12	M	L	64	12
		Mean ± SD	59.8±6.1	9.8±3.2

F = female; L = left; M = male; R = right; SD = Standard deviation.