Note that some links will break as pages are moved, websites are abandoned, etc.
If this happens, please try searching for the page in the Wayback Machine at www.archive.org.
Concludes "Studies using EPM (energetic placebo model) as placebo failed more frequently to show any differences between real acupuncture and placebo treatment than those using MPM (metameric placebo model) as placebo. On the other hand, sham acupuncture appears almost as active as 'real' acupuncture". Sanchez Aranjo M., Forsch Komplementarmed. (1998)