http://www.jcm.co.uk/drum-tower-archive/article/a-response-to-acupuncture-does-it-alleviate-pain-and-are-there-serious-risks-a-review-of-reviews-by-e-ernst-myeong-soo-lee-and-tae-young-choi-pain-r-volume-152-issue-4-april-2011-1606/