St. Louis Chiropractor. Dr. John Blalock provides Adjustments, Neck Pain, Back Pain, Personal Injury, Sports Injury, Auto Injury, Emergency Chiropractic Care, back pain relief, neck pain relief to the following locations: Affton, MO, Lemay, MO, Crestwood, MO. Affton, MO Chiropractor providing Adjustments, Neck Pain, Back Pain, Personal Injury, Sports Injury, Auto Injury, Emergency Chiropractic Care in St. Louis, Affton, MO, Lemay, MO, Crestwood, MO, Missouri.