Table 1.

Search Strategy for the PubMed Database

Number	Search Terms
1	Acupuncture. Mesh.
2	Acupuncture. ti, ab
3	Acupuncture therapy. Mesh
4	Acupuncture therapy. ti, ab
5	(acupuncture) and (therapy). ti, ab
6	Acupoint. Mesh.
7	Acupoint. ti, ab
8	Acupuncture*
9	Body acupuncture. ti, ab
10	(body) and (acupuncture). ti, ab
11	Manual acupuncture. ti, ab
12	(manual) and (acupuncture). ti, ab
13	Electroacupuncture. ti, ab
14	(electro) and (acupuncture). ti, ab
15	1 or 2–14
16	Migraine. Mesh.
17	Migraine*. ti, ab.
18	Headache*. ti, ab.
19	16 or 17–18
20	Randomized controlled trial. pt
21	Controlled clinical trial. pt
22	Randomized controlled trials. Mesh.
23	Random allocation. Mesh.
24	Randomized. ti, ab
25	Randomly. ti, ab
26	Double-blind method. Mesh
27	Single-blind method. Mesh
28	Clinical trial. at
29	20 or 21–28
30	15 and 19 and 29

Note: *There is no limit to the number of matches.

Abbreviations: ti, title; ab, abstract; pt, article type.