Table 1.

Search strategy in PubMed database.

No.	Search items
1	Coenzyme Q10. [mesh]
2	CoQ10. [mesh]
3	1 or 2
4	Polycystic Ovary Syndrome. [mesh]
5	Polycystic Ovarian Syndrome. [mesh]
6	PCOS. [mesh]
7	4 or 5 or 6
8	Randomized controlled trial. [pt]
9	Controlled clinical trial. [pt]
10	Clinical trials as topic [mesh: noexp]
11	Randomized [ti, ab]
12	Randomly. [ti, ab]
13	Placebo. [ti, ab]
14	Trial. [ti, ab]
15	8 OR 9 OR 10 OR 11 OR 12 OR 13 OR 14
16	3 AND 7 AND 15