Question: is this a 2) strong advice, 1) weak advice 0) no advice?

It has been used successfully in the treatment of phantom limb pain in adults (Bone, Critchley, & Buggy, 2002), children and adolescents (Bone, Critchley, & Buggy, 2002; Rusy, Troshynski, & Weisman, 2001) and for cancer-related NP in adults (Caraceni et al., 2004) and children (Jacob, 2004). 
user
This is no advice
assistant