 Patients will initially be randomized to one of two groups, each with a different model for practitioner-patient interaction. Acupuncture practitioners will be trained to follow semi-structured communicative styles, including traditional approaches in Chinese medicine and techniques previously described in patient-doctor communications studies. Within each of these groups, patients will be further randomized to receive either acupuncture or sham acupuncture. Patients will have 6 weeks of biweekly treatment visits. Patients will be followed for 6 months. Visits will be weekly during the first 6 weeks of the study and monthly thereafter. 