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APA Citation
Sun, J. W., Bourgeois, F. T., Haneuse, S., Hernández-Díaz, S., Landon, J. E., Bateman, B. T., & Huybrechts, K. F. (2021). development and Validation of a Pediatric Comorbidity Index. American journal of epidemiology, 190(5), 918–927. http://access.bl.uk/ark:/81055/vdc_100129523984.0x000054