Effect of once-daily fluticasone furoate/vilanterol vilanterol alone on bone mineral density in patients with COPD: a randomized, controlled trial oleh Francois Maltais, Isabelle Schenkenberger, Pascal L. M. L. Wielders, Juan Ortiz de Saracho, Kenneth Chinsky, Michael Watkins, Valerie Millar, Courtney Crim