The Online Patient Satisfaction Index for Patients With Low Back Pain: Development, Reliability, and Validation Study.
Tamana AfzaliHenrik Hein LauridsenJanus Nikolaj Laust ThomsenJan HartvigsenMartin Bach B JensenAllan RiisPublished in: JMIR formative research (2021)
ClinicalTrials.gov NCT03449004; https://clinicaltrials.gov/ct2/show/NCT03449004.