*Rajlakshmi Banerjee¹ (1. Associate Professor, RDDC and Research centre, Nagpur, Maharashtra , India)

*Yung-Chung Chen^1,2, Ting-Yin Ji³, Ming-Yeng Lin³, Chih-Yung Wu⁴ (1. School of Dentistry & Institute of Oral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan, 2. Division of Prosthodontics, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan, 3. Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, 4. Department of Aeronautic and Astronautics, National Cheng Kung University)

*Bayasgalan Ganbaatar¹ (1. Department of Prosthodontics, School of Dentistry, Mongolian National University of Medical Sciences)