1. Associate Professor, Dept. of Civil Engineering, Birzeit Univ., P.O. Box 14, Birzeit, West Bank, Palestine.
2. Assistant Professor, Dept. of Civil Engineering, United Arab Emirates Univ., P.O. Box 17555, Al-Ain-Abu Dhabi, United Arab Emirates.
3. Research Associate, Institute of Community and Public Health, Birzeit Univ., P.O. Box 14, Birzeit, West Bank, Palestine.