Anonymized (or de-identified) primary patient-level
data that underlie the findings described in the article "Predictors of opioid efficacy in patients with chronic pain: A prospective multicenter observational cohort study" published in PLOS ONE (<a href="https://doi.org/10.1371/journal.pone.0171723">https://doi.org/10.1371/journal.pone.0171723</a>)