1. Institute of Dentistry, Queen Mary University of London; Barts and The London School of Medicine and Dentistry; New Road London UK E1 1BB
2. Strydom Orthodontics Inc; 15 Kildare Rd Newlands Cape Town South Africa 7700
3. University of Bern; Department of Orthodontics and Dentofacial Orthopedics; Freiburgstr. 7 Bern Switzerland CH-3010
4. Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester; Cochrane Oral Health; J R Moore Building, Oxford Road Manchester UK
5. University of Washington; Department of Anesthesiology and Pain Medicine; Seattle USA 98195
6. Palacky University Olomouc; Department of Orthodontics, Institute of Dentistry and Oral Sciences, Faculty of Medicine and Dentistry; Palackého 12 Olomouc Czech Republic 772 00