Referencia:
- Ciciliani AM, et al. Int J Chron Obstruct Pulmon Dis. 2017;12:1565-1577.
- Anderson P, et al. Int J Chron Obstruct Pulmon Dis. 2006;1(3):251-259.
- Newman SP, et al. Chest. 1998;113(4):957-963.
- Wachtel H, et al. Pulm Ther. 2017;3:19-30.
- Zierenberg B. J Aerosol Med. 1999;12(suppl 1):S19-S24.
- Pitcairn G, et al. J Aerosol Med. 2005;18(3):264-272.
- Hänsel M, et al. Adv Ther. 2019. DOI: 10.1007/s12325-019-01028-y.