Tai chi for patients with Parkinson's disease. Author: Liu T, Lao L. Conference/Journal: N Engl J Med. Date published: 2012 May 3 Other: Volume ID: 366 , Issue ID: 18 , Pages: 1737; author reply 1738 , Word Count: 9 Comment on N Engl J Med. 2012 Feb 9;366(6):511-9. PMID: 22551136