1. Lecturer, Faculty of Built Environment, West Wing Red Centre Building, Kensington Campus, Univ. of New South Wales, Sydney, NSW 2052 (corresponding author).
2. Associate Professor, Dept. of Building, National Univ. of Singapore, 4 Architecture Dr., Singapore 117566.
3. Professor, Dept. of Civil and Environmental Engineering, 213 McLaughlin Hall, Univ. of California, Berkeley, CA 94720.
4. Assistant Professor, Dept. of Building, National Univ. of Singapore, 4 Architecture Dr., Singapore 117566.
5. Professor, Dept. of Building, National Univ. of Singapore, 4 Architecture Dr., Singapore 117566.