Placebo control--still the most ethical study design.
Kvarstein G, Måwe L, Indahl A, Hol PK, Tennøe B, Digernes R, Tønnessen TI, Beivik H, Stubhaug A.
Kvarstein G, et al. Among authors: hol pk.
Pain. 2010 Jan;148(1):174-175. doi: 10.1016/j.pain.2009.11.013. Epub 2009 Dec 3.
Pain. 2010.
PMID: 19962241
No abstract available.