@article {kallistratos2005nt,
	title = {NT Pro brain natriuretic peptide levels are strong predictors of functional capacity defined by cardiopulmonary exercise testing in heart failure},
	journal = {European Journal of Cardiovascular Prevention \& Rehabilitation},
	volume = {12},
	number = {3},
	year = {2005},
	author = {Kallistratos, M and Dritsas, A and Laoutaris, I and Cokkinos, D.V.}
}
