@article {cokkinos1999value,
	title = {The Value of Questionnaires in Assessing Physical Activity, Fitness, and Quality of Life},
	journal = {Heart failure reviews},
	volume = {3},
	number = {4},
	year = {1999},
	pages = {305{\textendash}311},
	publisher = {Kluwer Academic Publishers},
	author = {Cokkinos, Dennis V}
}
