作者单位:Albert Einstein Coll Med, Dept Pathol, Bronx, NY 10467 USA[1]Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Pathol, BR-14049900 Ribeirao Preto, SP, Brazil[2]Albert Einstein Coll Med, Dept Physiol & Biophys, Bronx, NY 10467 USA[3]Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Biochem & Immunol, BR-14049900 Ribeirao Preto, SP[4]