Without variable valve timing or variable valve lift, the valve timing must be the same for all engine speeds and conditions, therefore compromises are necessary. An engine equipped with a variable valve timing actuation system is freed from this constraint, allowing performance to be improved over the engine operating range.
A variety of medical specialists treat people with osteoporosis, including internists, gynecologists, family doctors, endocrinologists, rheumatologists, physiatrists, orthopaedists, and geriatricians. There are a number of ways to find a doctor who treats osteoporosis patients. If you have a primary care or family doctor, discuss your concerns with him or her. Your doctor may treat the disease or be able to refer you to an osteoporosis specialist.
A Doctor of Osteopathy (D.O.), more correctly called a Doctor of Osteopathic Medicine, is very much like a traditional medical doctor (M.D.), but receives additional training in the body's musculoskeletal system. doctor of osteopathy typically practices manipulative medicine treatment in addition to more traditional methods of symptom relief and prevention. A doctor of osteopathy studies the body as a whole.