This article refers to:
Scichilone N, Spatafora M, Battaglia S, Arrigo R, Benfante A, Bellia V. J Asthma Allergy. 2013;6:11–21.
On page 13, was incorrect. The corrected figure is:
Figure 1 Algorithm showing the switch from chlorofluorocarbon (CFC) to hydrofluoroalkane (HFA) propellants and development of extra-fine formulations.
