Cardiopulmonary and gas-exchange responses during the six-minute walk test in patients with chronic obstructive pulmonary disease

van Gestel A, Baty F, Rausch-Osthof A, Brutsche M. Cardiopulmonary and gas-exchange responses during the six-minute walk test in patients with chronic obstructive pulmonary disease. Respiration 2014; 88:307-14.