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 MedicineWake Forest UniversityWinston‐SalemNCUSA
7. Department of EpidemiologyRollins School of Public HealthEmory UniversityAtlantaGAUSA