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.
Best Answer: Doctor of Osteopathy...A doctor of osteopathic medicine (D.O.) is a physician licensed to perform surgery and prescribe medication. Like an M.D., an osteopath completes 4 years of medical school and can choose to practice in any specialty of medicine. However, osteopaths receive an additional 300 to 500 hours in the study of hands-on manual medicine and the body's musculoskeletal system.