RT Journal Article SR Electronic T1 The opioid problem in primary care JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 52 OP 53 DO 10.3399/bjgp20X707741 VO 70 IS 691 A1 Roy Robertson YR 2020 UL http://bjgp.org/content/70/691/52.abstract AB