Alan Whittemore says: Dr. Knopp is the best chiropractor in the world! I was a skeptic when I first walked (slid in sideways) into his office. Within 2 weeks, my chronic neck/shoulder pain was and is removed. Of course, periodic tune-ups are necessary, but with the use of x-rays and a machine that "pounds" your vertebrae back into place combined with manipulations, he is a miracle maker!