[1] Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Physiol, BR-14049 Ribeirao Preto, Brazil
[2] Univ Fed Sao Paulo, Dept Biophys, Sao Paulo, Brazil
[3] Max Delbruck Ctr Mol Med, Berlin, Germany
[4] Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Pharmacol, BR-14049 Ribeirao Preto, Brazil