Siemonsma, P. C., Schröder, C. D., Roorda, L. D. and Lettinga, A. T. (2010) “Benefits of treatment theory in the design of explanatory trials: cognitive treatment of illness perception in chronic low back pain rehabilitation as an illustrative example”., Journal of Rehabilitation Medicine, 42(2), pp. 111–116. doi: 10.2340/16501977-0492.