00339nas a2200109   4500000000100000008004100001100001200042700001400054700001200068245013500080022001400215       2021                            d1 aT. Chen1 aR. Knaggs1 aL. Chen00aAssociation between opioid-related deaths and prescribed opioid dose and psychotropic medicines in England: a case-crossover study  a0007-0912