@article {pmid15010742,
	title = {Systematic review of statistical methods used to analyze Seattle Angina Questionnaire scores},
	journal = {Can J Cardiol},
	volume = {20},
	number = {2},
	year = {2004},
	month = {Feb},
	pages = {187{\textendash}193},
	author = {Norris, C. M. and Ghali, W. A. and Saunders, L. D. and Brant, R. and Galbraith, P. D.}
}
