(Photo by Tom Houlihan/H-F Chronicle)
For some 18,000 people, it’s a good thing Dr. Ralph Kruse had back pain when he was a young man.
Kruse was a pre-med student at State University of New York – Stony Brook with plans to become a veterinarian.
“But I’d had this back pain for four years,” Kruse said. “A friend said, ‘You should go to my chiropractor.’ I wasn’t so sure about whether I…


