1. Departamento de Fonoaudiología, Universidad de Chile, Santiago, Chile
2. Department Speech and Language Pathology, Universidad de Valparaíso, Valparaíso, Chile
3. PhD Program in Health Sciences and Engineering, Universidad de Valparaíso, Valparaíso, Chile
4. Departament of Sound, Universidad de Chile, Santiago, Chile
5. New York Vocal Coaching Studio Inc, New York, NY, USA
6. Speech and Voice Research Laboratory, Faculty of Social Sciences, Tampere University, Tampere, Finland