Periodic breathing during incremental exercise predicts mortality in patients with chronic heart failure evaluated for cardiac transplantation - Leite, João J.; Leite, João J.; Freitas, Humberto F. G. de; Chizola, Paulo R.; Neder, J. Alberto; Mansur, Alfredo José; Bocchi, Edimar A.; Terra-Filho, Mario; Lorenzi-Filho, Geraldo (2003)