Chiropractors are highly educated, skilled health care professionals who are licensed in all 50 states. In fact, chiropractic is growing even more internationally. Now over 60 countries regulate chiropractic care. Like medical doctors, chiropractors are required to complete pre-medical program in college. They then go on to an accredited chiropractic college and complete a 4 year extensive program that includes both classroom and clinical experience. Chiropractors are required to pass a 4-part national exam and they also must pass a state exam for the states they wish to practice in. Many chiropractors also complete a post-graduate program or a post-doctoral program in various chiropractic sub-specialties, like orthopedics, pediatrics, nutrition, orthopedics, rehabilitation, sports, or radiology. Most states require chiropractors to take continuing education credits in various chiropractic topics. This gives chiropractors an opportunity to keep their skills up to date, and also stay up to date on the latest research.