Joshua Amaya‡12, Veronica H. Ryan§13 and Nicolas L. Fawzi‡4 From the ‡Department of Molecular Pharmacology, Physiology, and Biotechnology and the §Graduate Program in Neuroscience, Brown University, Providence, Rhode Island 02912 ↵4 To whom correspondence should be addressed: Dept. of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, RI 02912. Tel.: 401-863-5232; Fax: 401-863-6087; E-mail: nicolas_fawzi{at}brown.edu. ↵1 Both authors contributed equally to this work.