1. F. Hoffmann-La Roche AG, CH-4070 Basel, Switzerland, Roche Bioscience, 3401 Hillview Avenue, Palo Alto, California 94304, Hoffmann-La Roche, Inc., Nutley, New Jersey 07110-1199, Roche Products, Ltd., Welwyn Garden City, Hertfordshire AL7 3AY, U.K., Nippon Roche K.K., 200 Kajiwara, Kamakura City, Kanagawa Prefecture 247-8530, Japan, and Roche Diagnostics GmbH, Sandhoferstrasse 116, DE-68305 Mannheim, Germany