ZhuGe R, Fogarty KE, Tuft RA, Lifshitz LM, Sayar K, Walsh JV. Dynamics of signaling between Ca(2+) sparks and Ca(2+)- activated K(+) channels studied with a novel image-based method for direct intracellular measurement of ryanodine receptor Ca(2+) current. J Gen Physiol. 2000 Dec; 116(6):845-64.