Predictors of the length of stay of psychiatric inpatients: protocol for a systematic review and meta-analysis oleh Farid Carranza Navarro, Neri Alejandro Álvarez Villalobos, Andrea Muriel Contreras Muñoz, Andrea Fernanda Guerrero Medrano, Natalia Sofía Tamayo Rodríguez, Erasmo Saucedo Uribe