A randomised controlled study of the effectiveness of breathing retraining exercises taught by a physiotherapist either by instructional DVD or in face-to-face sessions in the mana... oleh Mike Thomas, Anne Bruton, Paul Little, Stephen Holgate, Amanda Lee, Lucy Yardley, Steve George, James Raftery, Jennifer Versnel, David Price, Ian Pavord, Ratko Djukanovic, Michael Moore, Sarah Kirby, Guiqing Yao, Shihua Zhu, Emily Arden-Close, Manimekalai Thiruvothiyur, Frances Webley, Mark Stafford-Watson, Elizabeth Dixon, Lynda Taylor