1. The University of Montana, Missoula, MT, USA
2. Universidad del Valle de México, Mexico City, México
3. Auditory Research Center, Lake Erie College of Osteopathic Medicine, Erie, PA, USA
4. Department of Neurology, Geisel School of Medicine at Dartmouth, Hanover NH, USA
5. Emergency Department, Hospital San Angel Inn Sur, Mexico City, Mexico
6. Department of Otolaryngology –Head and Neck Surgery, Henry Ford Macomb Hospital, Clinton Township, MI, USA
7. Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional, Autónoma de México, México
8. Universidad Autónoma de Piedras Negras, Piedras Negras, Coahuila, México
9. Neurology Department, Erciyes University, Kayseri, Turkey
10. Interdisciplinary Statistical Research Unit, Indian Statistical Institute, Kolkata, India