1. Spain National Center, Foundation Come Collaboration , Barcelona , Spain
2. Iberoamerican Cochrane Centre – Biomedical Research Institute Sant Pau , IIB Sant Pau, C. Sant Atoni Maria Claret 167, Pavelló 18, Planta 0 , 08025 Barcelona , Catalunya , Spain
3. Institute for Vestibular Rehabilitation and Balance , Barcelona , Spain
4. PhD program on Biomedical Research Methodology and Public Health, Universitat Autònoma de Barcelona , Barcelona , Spain