Effectiveness of the MULTIPAP Plus intervention in youngest-old patients with multimorbidity and polypharmacy aimed at improving prescribing practices in primary care: study protocol of a cluster randomized trial

del Cura-Gonzalez, I; Lopez-Rodriguez, JA; Leiva-Fernandez, F; Gimeno-Feliu, LA; Pico-Soler, V; Bujalance-Zafra, MJ; Dominguez-Santaella, M; Polentinos-Castro, E; Poblador-Plou, B; Ara-Bardaji, P; Aza-Pascual-Salcedo, M; Rogero-Blanco, M; Castillo-Jimenez, M;...