One health maintenance organization (HMO in Madison, Wisconsin, has opened its Complementary Medicine and Wellness Center. At the center, HMO members are offered a variety of services. If you are suffering from a sore back, try some massage treatments to relax your muscles and encourage the flow of healing energy in your body. If you have allergies or asthma, you could try homeopathy, which uses tiny amounts of allergens to stimulate your body's natural immune response. And if you're not ill, but just want to improve your strength and focus your mind, try a tai chi or yoga class Patients who use these complementary medicine services appreciate an alternative to surgery or to drugs and their side effects. They also enjoy activities and therapies that make them feel better even if they're not sick. And from the financial point of view of the HMO, preventing illness whenever possible is much less expensive than a hospital stay