Comparison between the phase angle and phase shift parameters to assess thoracoabdominal asynchrony in COPD patients - Porras, Desidério Cano; Lunardi, Adriana C; Silva, Cibele C. B. Marques da; Paisani, Denise M; Stelmach, Rafael; Carvalho, Celso Ricardo Fernandes de; Moriya, Henrique Takachi (Journal of Applied Physiology, 2017)