<qa>  What is the cost-effectiveness of hypnosis?All participants will be taking AIs for breast cancer, will be experiencing some musculoskeletal pain since starting AIs 3 on a 10 point scale, and will be randomized to one of the two intervention groups. Study participants will be asked to complete measures of pain, AI adherence, and other behavioral and psychosocial measures over the course of 12-month period. The follow-up assessments will evaluate the clinical efficacy and cost-effectiveness of hypnosis versus professional attention. 