Fig. 1From: Spatial heterogeneity and socioeconomic determinants of opioid prescribing in England between 2015 and 2018Hierarchical organization of the administrative spatial units in England. Schema of the multiple administrative resolutions of an exemplary LAD (Purbeck): the bold black line draws the external boundary, colored areas delimit the corresponding MSOA, and the internal borders in light gray define the fine-grained organization in LSOABack to article page