The California Health Dept. investigates a local hospital accused of using patients as “unwitting guinea pigs” for experimental Stryker bone-growth products. California authorities are investigating a local hospital accused of using experimental Stryker (NYSE:SYK) and Medtronic (NYSE:MDT) bone growth proteins on patients without their consent. Lawyers for the plaintiff in a lawsuit against the medical device companies and the hospital claim that at least 17 patients were involved in a secret “research project” at the Pomona Valley Hospital Medical Center in Pomona, Calif., in which they were randomized to receive experimental treatment with Stryker’s OP-1 Putty without their knowledge.