Laoutaris ID, Dritsas A, Brown MD, Manginas A, Kallistratos MS, Alivizatos PA, Cokkinos DV. Improvement in life quality after inspiratory muscle training is associated with decreased dyspnea and an increase in 6-min walk test distance in chronic heart failure. In: EUROPEAN HEART JOURNAL. Vol. 27. OXFORD UNIV PRESS GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND; 2006. pp. 338–339.