In the article titled “Circulating Endocannabinoids and Insulin Resistance in Patients with Obstructive Sleep Apnea” [1], a grant number was missing. The Acknowledgments section should be updated as follows:

This study was supported by a grant from the Health Bureau of Gansu Province (no. GSWSKY-2014-28) and a grant from the Natural Science and Technology Fund of Gansu province (no. 1506RJZA254).