Ultrasound measurement of quadriceps wasting in patients with GOLD stage II COPD and its relationship to physical activity
Dinesh Shrikrishna, Rebecca Tanner, Mehul Patel, Anna V.J. Donaldson, Cayley Smith, Zudin A. Puthucheary, John M. Seymour, Paul S. Sidhu, Nicholas Hart, John Moxham, Michael I. Polkey, Nicholas S. Hopkinson
European Respiratory Journal 2011 38: 4879; DOI: