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. 2021 May 26;11(5):e043964. doi: 10.1136/bmjopen-2020-043964

Figure 1.

Figure 1

Patientflow diagram of study participants used for training and validating ML models. DAD, Discharge Abstract Database; ML, machine learning; PIN, Pharmaceutical Information Network; NACR, National Ambulatory Care Reporting System; VS, vital statistics.