Effectiveness and cost-effectiveness of a multicomponent intervention to implement a clinical practice guideline for systemic lupus erythematosus: protocol for a cluster-randomized... oleh María M. Trujillo-Martín, Yolanda Ramallo-Fariña, Tasmania del Pino-Sedeño, Íñigo Rúa-Figueroa, Elisa Trujillo-Martín, Laura Vallejo-Torres, Iñaki Imaz-Iglesia, Ricardo Sánchez-de-Madariaga, Ana M. de Pascual-Medina, Pedro Serrano-Aguilar, SLE-CPG-Implementation Group