title: Reply.
authors.affiliation: The Hospital For Sick Children (SickKids), Toronto, Canada.
authors.forename: Vitor C
authors.initials: VC
authors.lastname: Guerra
authors.affiliation: Heart Institute (InCor) - University of Sao Paulo Medical School, Sao Paulo, Brazil.
authors.forename: Jeane M
authors.initials: JM
authors.lastname: Tsutsui
authors.affiliation: Heart Institute (InCor) - University of Sao Paulo Medical School, Sao Paulo, Brazil.
authors.forename: Wilson
authors.initials: W
authors.lastname: Mathias