Tyszkowski, JR. (1999) 'Physical therapy, chiropractic manipulation, or an educational booklet for back pain', N Engl J Med.1999 Feb 4;340(5):389; author reply 390.
N Engl J Med.1999 Feb 4;340(5):389; author reply 390.
Physical therapy, chiropractic manipulation, or an educational booklet for back pain