1. University of Puerto Rico, Department of Physics, Rio Piedras Campus, P.O. Box 23343, San Juan 00931-3343, Puerto Rico
2. Russian Academy of Sciences, Sechenov Institute of Evolutionary Physiology and Biochemistry, St. Petersburg, Russia
3. Lomonosov State University, Department of Vertebrate Zoology, Moscow 119992, Russia
4. Russian Academy of Sciences, Institute of Higher Nervous Activity and Neurophysiology, Butlerova Street 5a, Moscow 117485, Russia
5. Universidade do Algarve, Centro de Investigação em Química do Algarve (CIQA), Faro 8005-139, Portugal
6. Universidad Central del Caribe, School of Medicine, Department of Physiology, Bayamón 00960-6032, Puerto Rico