Table 6.

Top five frequently co-cited references.

Ranking	Title	Author	Journal	Frequency	Year
1	Acupuncture for patients with migraine a randomized controlled trial	Linde K	JAMA-Journal of the American Medical Association	89	2005
2	Acupuncture for migraine prophylaxis	Linde K	Cochrane Database of Systematic Reviews	69	2009
3	Efficacy of acupuncture for the prophylaxis of migraine: A multicentre randomized controlled clinical trial	Diener HC	Lancet Neurology	65	2006
4	Acupuncture in patients with tension-type headache: Randomized controlled trial	Melchart D	BMJ-British Medical Journal	63	2005
5	Acupuncture for chronic headache in primary care: Large, pragmatic, randomized trial	Vickers AJ	BMJ-British Medical Journal	41	2004