1. Departamento de Fisica, Universidade Federal de Santa Catarina, Florianopolis 88040-970, Brasil
2. Department of Physiology and Biophysics, Weill Cornell Medical College of Cornell University, New York, New York 10065, United States
3. Sanders Tri-Institutional Therapeutics Discovery Institute, 1230 York Avenue, Box 122, New York, New York 10065, United States
4. Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego 92093, United States