“…24 Of the cohorts, 22 were of population-based representativeness of PWE in the base population. 21,24,[26][27][28]30,32,33,[36][37][38][40][41][42][43][44][45][46]48,[51][52][53] Four cohorts of high representativeness used a single source for case identification with a concomitant risk of incomplete case ascertainment. 20,29,50,54 For example, 2 cohorts were based on nationwide Finnish drug reimbursement registries, which do not automatically identify permanently institutionalized PWE.…”