Biomass smoke COPD has less tomographic abnormalities but worse hypoxemia compared with tobacco COPD - Meneghini, Andréa Cristina; Santos, Marcel Koenigkam; Pereira, Mônica Corso; Tonidandel, Paulo Roberto; Terra Filho, João; Cunha, Fernando de Queiroz; Menezes, Marcelo Bezerra de; Vianna, Elcio dos Santos Oliveira (Brazilian Journal of Medical and Biological Research, 2019)