@article{Vogelmeier:61960,
      author        = "Vogelmeier, Claus F. and Gaga, Mina and Aalamian-Mattheis,
                       Maryam and Greulich, Timm and Marin, Jose M. and
                       Castellani, Walter and Ninane, Vincent and Lane, Stephen
                       and Nunez, Xavier and Patalano, Francesco and Clemens,
                       Andreas and Kostikas, Konstantinos",
      title         = "{Efficacy and safety of direct switch to
                       indacaterol/glycopyrronium in patients with moderate COPD:
                       the CRYSTAL open-label randomised trial}",
      year          = "2017",
}