Erratum
In the report "Long-term synaptic potentiation in the superior cervical ganglion" by T. H. Brown and D. A. McAfee (12 March, p. 1411), equation 2 and the following lines should read:
[See equation in the PDF]
where
[See equation in the PDF]
is the early, rapidly decaying component and [See equation in the PDF] is the slowly decaying, long-term component.