Treating chronic back pain with open-label placebo

Carvalho, Cláudia & Caetano, J. M. (2016). Open-label placebo treatment in chronic low back pain: a randomized controlled trial. Pain, 157(12), 2766-2772.

Treating IBS with open-label placebo

Kaptchuk, Ted J. & Friedlander, Elizabeth (2010). Placebos without deception: a randomized controlled trial in irritable bowel syndrome. PLOS One, 5, 1-7.

The first open-label placebo trial

Park, Lee C. & Covi, Lino (1965). Nonblind placebo trial: an exploration of neurotic patients' responses to placebo when its inert content is disclosed. Archives of General Psychiatry, 12(4), 336-345.