Adverse drug reaction extraction on electronic health records written in spanish - Sara Santiso; Alicia Pérez Ramírez (dir. tes.); Arantza Casillas Rubio (dir. tes.); Raquel Martínez Unanue (pres.); Arantza Díaz de Ilarraza Sánchez (secr.); Lluís Padró Cirera (voc.) (2019)