From the authors:
We greatly appreciate the letter from M. González-García and C. Torres-Duque in response to our paper comparing the different phenotypes of chronic obstructive pulmonary disease (COPD) in tobacco smoke- versus biomass smoke-induced COPD [1]. The information they provide from publications that we failed to cite strengthens the case for our conclusions and contributes to a better understanding of COPD sub-phenotypes. …