1. Associate Professor, Dept. of Construction Management and Real Estate, Southeast Univ., Nanjing 210096, China (corresponding author).
2. Professor, Dept. of Building, National Univ. of Singapore, Singapore 117566.
3. Professor, Dept. of Construction Management and Real Estate, Southeast Univ., Nanjing 210096, China.
4. Lecturer, School of Engineering and Technology, Central Queensland Univ., 400 Kent St., Sydney, NSW 2000, Australia; formerly, Ph.D. Candidate, Dept. of Building, National Univ. of Singapore, Singapore 117566.