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. 2023 Dec 11;28(1):9. doi: 10.1007/s10151-023-02874-3

Fig. 1.

Fig. 1

Flow diagram of patients included in study. *CPRD flag for acceptable quality of data,  +data includes period outside practice registration with CPRD,  **no event date, episode start date after discharge, death prior to episode start, age > 110