Authors
Vera Studer
Center for Dental Medicine, University of Zurich, Zurich, Switzerland
Despina Koletsi
Clinic of Orthodontics and Paediatric Dentistry, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
Theodore Eliades
Clinic of Orthodontics and Paediatric Dentistry, Center for Dental Medicine, University of Zurich, Zurich, Switzerland