1. From Department of Physiological Sciences (T.S.C., A.P.T., F.K.M.), Faculty of Dentistry of Piracicaba, State University of Campinas, Piracicaba, Sao Paulo, Brazil; Laboratory of Physiology (M.J.C.S.M.), Life Sciences Center, Pontifical Catholic University of Campinas, Campinas, Sao Paulo, Brazil; Laboratory of Biochemistry (C.F.B.), Life Sciences Center, Pontifical Catholic University of Campinas, Campinas, Sao Paulo, Brazil.