TY - SER AU - Chamas,P.P.C. AU - Oliveira,V.M.C. AU - Yamaki,F.L. AU - Larsson,M.H.M.A. TI - Time-domain signal-averaged electrocardiogram in healthy German Shepherd and Boxer dogs KW - CÃO KW - ELETROCARDIOGRAMA KW - CARDIOPATIA ER -