1. Department of Orthopedic Surgery, Foot and Ankle Service, North Shore Medical Group, Evanston, IL.
2. Department of Epidemiology and Biostatistics, Hospital for Special Surgery, New York, NY.
3. Department of Orthopaedic Surgery, Göteborg University Hospital, Göteborg, Sweden.
4. Department of Orthopaedic Surgery, Crystal Run Healthcare, Middletown, NY.
5. Department of Foot and Ankle Surgery, Hospital for Special Surgery, New York, NY.