This week's topics: whether surgery works for shoulder impingement, framing test results positively for patients, vagus nerve stimulation for frequent migraines, and a commentary on shared decision-making. Study links: Impingement: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5734212/ ; Vagus nerve stimulation: https://www.ncbi.nlm.nih.gov/pubmed/29907608 ; and Positive messaging: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1495144/