1. Hospital General Regional IMSS No. 21, Department of Internal Medicine, León, Guanajuato, Mexico
2. Department of Medicine and Nutrition, Universidad de Guanajuato, Guanajuato, Mexico
3. Hospital General de León, Department of Radiology, León, Guanajuato, Mexico
4. University of Groningen, University Medical Center Groningen, Department of Neurology, The Netherlands
5. University of Groningen, University Medical Center Groningen, Alzheimer Center Groningen, The Netherlands