Trends in child and adolescent mental health in Catalonia in the context of the COVID-19 pandemic during the 2020¿2021 school year Elena Alcover Bloch; Anna Gatell Carbó; Josep Vicent Balaguer Martínez; Tomás Pérez Porcuna; Olga Salvadó Juncosa; Emilio Fortea Gimeno; Patricia Álvarez Garcia;

Predictive capacity for breastfeeding and determination of the best cut-off point for the breastfeeding self-efficacy scale-short form Josep Vicent Balaguer-Martínez; Rubén García-Pérez; Ana Gallego-Iborra; Elena Sánchez-Almeida; María Dolores Sánchez-Díaz; Edurne Ciriza-Barea;

Frequency, risk and impact measures in epidemiology Carlos Ochoa Sangrador; Eduardo Ortega Páez; Manuel Molina Arias; Fernando Carvajal Encina; Eduardo Cuestas Montañes;