Recommendations for chamber quantification - Lang, R M; Bierig, M; Devereux, R B; Flachskampf, F A; Foster, E; Pellikka, P A; Picard, M H; Roman, M J; Seward, J; Shanewise, J S; Solomon, S D; Spencer, K T; Sutton, M S; Stewart, W J (J Am Soc Echocardiogr, 2005)