Original sentence: However, there is little or no scientific evidence that acupuncture works for many of the conditions for which it is often used".The guidance within the UK National Health Service is that acupuncture is supported for treatment of low back pain, and that "there is some evidence that acupuncture works for a small number of other conditions, including migraine and post-operative nausea
Edited sentence: The guidance within the UK National Health Service is that "there is little or no scientific evidence that acupuncture works for many of the conditions for which it is often used", and its use is only supported for lower back pain