Diaphragmatic Breathing Training Program Improves Abdominal Motion During Natural Breathing in Patients With Chronic Obstructive Pulmonary Disease: A Randomized Controlled Trial - Yamaguti, Wellington P.; Claudino, Renata C.; Neto, Alberto P.; Chammas, Maria C.; Gomes, Andrea C.; Salge, João M.; Moriya, Henrique Takachi; Cukier, Alberto; Carvalho, Celso R. (Archives of physical medicine and rehabilitation, 2012)