1. Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hong Kong, China (corresponding author).
2. Chair Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hong Kong, China.
3. Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hong Kong, China.
4. Dept. of Construction and Real Estate, School of Management, Harbin Institute of Technology, Harbin 150001, China.