Risk Factors Associated With Transition From Acute to Chronic Low Back Pain in US Patients Seeking Primary Care. - Stevans JM; Delitto A; Khoja SS; Patterson CG; Smith CN; Schneider MJ; Freburger JK; Greco CM; Freel JA; Sowa GA; Wasan AD; Brennan GP; et al. (JAMA network open, 2021)