1. For products that are indicated for use in opioid-tolerant patients only (i.e., fentanyl transdermal patches, extended-release hydromorphone pills and extended-release morphine pills >90mg), describe trends in the proportion of prescriptions for these products to opioid-non-tolerant patients in the year preceding the availability of REMS-compliant CE courses and compare the proportion of prescriptions to opioid non-tolerant patients pre- versus post-REMS CE course availability