1. Department of Chemistry, University of Puerto Rico, Mayagüez Campus, P.O. Box 9019, Mayagüez, Puerto Rico 00681-9019
2. Department of Physiology and Biophysics, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461
3. Department of Biochemistry, School of Medicine, University of Puerto Rico, Medical Sciences Campus, P.O. Box 365067, San Juan, Puerto Rico 00936-5067
4. Universidad Nacional de Quilmes, 1876 Bernal, Argentina
5. INSERM U779, University of Paris 11, Hôpital de Bicetre, 94275 Le Kremlin-Bicetre, France