BPSDB There's a plethora of a letter at A Case of Chiropractic Manipulation Immediately Relieving Depression with Chronic Pain:
Patient A, a 41-year-old Taiwanese male, suffered from intermittent dysthymia which presented with minor low mood, insomnia, anxiety, chest tightness, back pain, and subjectively mild occupational difficulty... patient A received a single chiropractic spinal manipulation. The chiropractor noticed a minor deformity in the thoracic spine, and a traction technique was administered. He experienced immediate relief from back pain. The following day he reported complete relief of chest tightness, dysthymia, fatigue, and insomnia, with HAM-D, TDQ, and VAS scores of 0 for all.
“No, no, I'm fine now, no need to do any more chiropractic on me, I'll be off then...”