1. Tong Wah Lim, Division of Restorative Dental Sciences, Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, Sai Ying Pun, Hong Kong, Hong Kong SAR
2. *Juzailah Roffie, DDS, Universiti Sains Malaysia Institut Perubatan dan Pergigian Termaju Bertam, Pulau Pinang, Malaysia