1. Genzyme Corp., 153 Second Avenue, Waltham, Massachusetts 02451
2. AnorMED, Inc., 200-20353 64th Avenue, Langley, British Columbia, V2Y 1N5, Canada
3. Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium