1. Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
2. Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
3. Department of Management, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
4. School of Built Environment, Engineering and Computing, Leeds Beckett University, Leeds, UK