RT Journal Article SR Electronic T1 Simple screening model for identifying the risk of sleep apnea in patients on opioids for chronic pain: an infographic JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2021-103010 DO 10.1136/rapm-2021-103010 A1 Rajnish K Gupta A1 Eric S Schwenk YR 2021 UL http://rapm.bmj.com/content/early/2021/08/09/rapm-2021-103010.abstract AB