Recommendations of the Spanish Society of Paediatric Cardiology and Congenital Heart Disease as regards the use of drugs in attention deficit hyperactivity disorder in children and adolescents with a known heart disease, as well as in the general paediatric population: position statement by the Spanish Paediatric Association Javier Pérez-Lescure Picarzo; Fernando Centeno Malfaz; David Crespo Marcos; Rosa Collell Hernández; Teresa Fernández Soria; Begoña Manso García; Henar Rojo Sombrero; Anna Sabaté Rotés; Georgia Sarquella-Brugada;