American Journal of Physiology: Heart & Circulatory Physiology. Sep2009, Vol. 297 Issue 3, pH960-H967. 8p. 2 Color Photographs, 2 Black and White Photographs, 15 Graphs.
American Journal of Physiology: Heart & Circulatory Physiology. May2007, Vol. 292 Issue 5, pH2432-H2437. 6p. 2 Black and White Photographs, 2 Charts, 2 Graphs.