Design of a remote multiparametric tool to assess mental well-being and distress in young people (mhealth methods in mental health research project): protocol for an observational study Castro Ribeiro Thais García Pagès Esther Ballester Laura Vilagut Gemma García Mieres Helena Suárez Aragonès Víctor Amigo Franco Bailón Raquel Universidad de Zaragoza Mortier Philippe Pérez Sola Víctor Serrano-Blanco Antoni Alonso Jordi Aguiló Jordi 2024 research-article