1. Department of NeurologyMayo ClinicRochesterMNUSA
2. Department of NeurologyJohns Hopkins University School of MedicineBaltimoreMDUSA
3. Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
4. Department of BiostatisticsUniversity of North Carolina at Chapel HillChapel HillNCUSA
5. Department of MedicineUniversity of Mississippi Medical CenterJacksonMSUSA
6. Division of Public Health SciencesSchool of Medicine, Wake Forest UniversityWinston‐SalemNCUSA
7. Division of Epidemiology and Community HealthSchool of Public Health, University of MinnesotaMinneapolisMNUSA