Digital platform for the prevention of suicidal behaviour and non-suicidal self-injuries in adolescents: the Smartcrisis-Teen study protocol Abascal-Peiró Sofía Peñuelas-Calvo Inmaculada Alacreu-Crespo Adrián Universidad de Zaragoza Sáiz Pilar Alejandra De la Torre-Luque Alejandro Ruiz-Veguilla Miguel Barrigón María Luisa Courtet Philippe López-Castroman Jorge Baca-García Enrique Porras-Segovia Alejandro 2024 research-article