1. CDComartin Inc., 7683 Andrea Ave., Stockton, CA 95207-1705, USA
2. British Columbia Institute of Technology, 3700 Willingdon Ave., Burnaby, BC V5G 3H2, Canada
3. John A Martin and Assoc., 1212 Flower St., Los Angeles, CA 90015, USA
4. Earthquake Engineering Research Institute, 499 14th St., Suite 320, Oakland, CA 94612, USA
5. Dept. of Civil Engineering, Catholic University of Peru, POB 1761, Lima 32, Peru
6. Dept. of Civil Engineering, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
7. Dept. of Architecture and Civil Eng., University of Bath, Bath, BA2 7AY, United Kingdom
8. National Center for Earthquake Eng., Kaddour Rahim St., BP 252, Hussein-Dey, Algiers, 16040 Algeria
9. Dept. of Civil Engineering, Indian Institute of Technology, Kanpur, 208 016 India
10. The World Bank, 1818 H St., NW, Washington DC 20433, USA
11. Consultant, 875 Dolores St., #4, San Francisco, CA 94110, USA
12. Faculty of Engineering, University of Pisa, Via Diotisalvi n. 2, 56126 Pisa, Italy