1 Department of Orthodontics, University of Puthisastra, Phnom Penh, Cambodia; Department of Orthodontics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamilnadu, India. Electronic address: avenugopal@puthisastra.edu.kh.
2 Division of Orthodontics, Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alberta, Canada.