Table 1.

Controls characteristics

Control	Sex	Age (years)	Menstruation
1	F	21	No
2	F	35	Yes
3	F	33	No
4	F	32	Yes
5	F	23	Yes
6	F	29	Yes
7	F	27	No
8	F	36	Yes
9	F	20	No
10	F	37	No
11	F	32	No
12	F	40	No
13	F	30	No
14	F	35	Yes
15	F	38	No
16	F	33	No
17	F	34	No
18	F	20	No
19	F	36	Yes
20	F	35	No
21	F	27	No
22	F	37	No