1. Assistant Professor, Safety and Resilience Research Unit (SaRRU), Dept. of Building, School of Design and Environment, National Univ. of Singapore, 4 Architecture Dr., Singapore 117566, Singapore (corresponding author).
2. Research Fellow, Safety and Resilience Research Unit (SaRRU), Dept. of Building, School of Design and Environment, National Univ. of Singapore, 4 Architecture Dr., Singapore 117566, Singapore.