Presenting doubts regarding the mechanisms of acupuncture effects
The patients expressed that they were not sure if it was the acupuncture that had been effective, or if improvements had occurred due to the natural history. Some patients claimed that they had not noticed effects of their acupuncture therapy but believed that acupuncture would help other patients. Several patients claimed that they believed acupuncture to be effective, since they previously experienced positive effects from acupuncture.