Narang, MD, S.; Wasan, MD, MSc, A. D.; Ross, MD, E. L.; Michna, MD, E.; Chen, MD, J.-Y.; Jamison, PhD, R. N. Patients With Chronic Pain on Opioid Therapy Taking Dronabinol: Incidence of False Negatives Using Radioimmunoassay. J of Opioid Management 2018, 4, 21-26.