Bean DJ, Johnson MH, Kydd RR. Relationships between psychological factors, pain, and disability in complex regional pain syndrome and low back pain. Clin J Pain. 2014 Aug; 30(8): 647-653.
Beerthuizen A, Stronks DL, et al.: The association between psychological factors and the development of complex regional pain syndrome type 1 (CRPS1)—A prospective multicenter study. Eur J Pain. 2011; 15: 971–975.
Harden RN, Bruehl S, et al.: Development of a severity score for CRPS. Pain. 2010; 151: 870–876.