The authors are at the Department of Neuroscience, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. E-mail: levitani{at}mail.med.upenn.edu
American Association for the Advancement of Science
Author Information
Stacey Nee MacFarlane and
Irwin B. Levitan
The authors are at the Department of Neuroscience, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. E-mail: levitani{at}mail.med.upenn.edu