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 81595-39998, Iran
3. Department of the Built Environment, Birmingham City University, City Centre Campus, Millennium Point, Birmingham B4 7XG, UK
4. Faculty of Engineering and the Built Environment, University of Johannesburg, Johannesburg 2092, South Africa
5. Department of Civil Engineering, Polytechnic University of Madrid, 28031 Madrid, Spain