Correction: In the article, “Use-Dependent Decline of Paired-Pulse Facilitation at Aplysia Sensory Neuron Synapses Suggests a Distinct Vesicle Pool or Release Mechanism,” by X.-Y. Jiang and T.W. Abrams, which appeared on pages 10310–10319 of the December 15, 1998 issue, Equation 1 (page 10311) should read as follows:
