Català, M. ., Burn, E. ., Rathod-Mistry, T. ., Xie, J. ., Delmestri, A. ., Prieto-Alhambra, D. ., & Jödicke, A. M. (2023). Observational methods for COVID-19 vaccine effectiveness research: an empirical evaluation and target trial emulation. Int J Epidemiol. http://doi.org/10.1093/ije/dyad138