Characterization and classification of Parkinson's disease patients based on symbolic dynamics analysis of heart rate variability. - Guadalupe Dorantes-Méndez; Martín O. Méndez; Laura E. Méndez-Magdaleno; Brenda G. Muñoz-Mata; Ildefonso Rodríguez-Leyva; Aldo R. Mejía-Rodríguez (Biomed. Signal Process. Control., 2022)