1. Res. Assoc., Dept. of Build. and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Hong Kong.
2. Assoc. Prof., Dept. of Build. and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Hong Kong.
3. Sr. Lect., School of Arch. and Build., Deakin Univ., Geelong Vic 3217, Australia.