Drooling, Swallowing Difficulties and Health Related Quality of Life in Parkinson's Disease Patients - Yohana Arboleda-Montealegre, Gladis; Cano-de-la-Cuerda, Roberto; Fernandez-de-las-Penas, Cesar; Sanchez-Camarero, Carlos; Ortega-Santiago, Ricardo; (International Journal Of Environmental Research And Public Health, 2021)