RT Journal Article SR Electronic T1 T’ai chi for individuals with COPD: an ancient wisdom for a 21st century disease? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1005 OP 1007 DO 10.1183/09031936.00128512 VO 41 IS 5 A1 Martijn A. Spruit A1 Michael I. Polkey YR 2013 UL http://erj.ersjournals.com/content/41/5/1005.abstract AB