1 Department of RadiologyMayo ClinicRochester, Minnesota.
2 Department of RadiologyCalifornia Pacific Medical CenterSan Francisco, California.
3 Departments of Radiology and Nuclear MedicineVU University Medical CenterAmsterdam, the NetherlandsQueen Square Institute of Neurology and Centre for Medical Image ComputingUniversity CollegeLondon, UK.
4 Departments of Radiology and NeurosurgeryWashington University School of MedicineSt. Louis, Missouri.
5 Departments of Radiology and NeurologyWashington University School of MedicineSt. Louis, Missouri.
6 Department of RadiologyBoston Children's HospitalBoston, Massachusetts.
7 Department of NeurologyMayo ClinicRochester, Minnesota.
8 Departments of Radiology and Biomedical EngineeringWake Forest School of MedicineWinston-Salem, North Carolina.