00455nas a2200169   4500000000100000000000100001008004100002100001100043700001700054700001500071700001500086700001700101245013600118300001100254490000600265022001400271       2014                            d1 aW. Gao1 aM. Gulliford1 aM. Bennett1 aF. Murtagh1 aI. Higginson00aManaging cancer pain at the end of life with multiple strong opioids: a population-based retrospective cohort study in primary care  ae792660 v9  a1932-6203