4. Each hospital was contacted through its randomly selected Clinical Director and/or director of Cardiology Unit and invited to participate.
4. Cada hospital sorteado se contrató vía director clínico y/o director de Cardiología, y se le invitó a participar en el estudio.
4. Cada hospital sorteado foi contatado via diretor clínico e/ou diretor da Cardiologia, e convidado a participar do estudo.