Cite

    Yaqian Zhu et al.. “Core concepts in pharmacoepidemiology: Violations of the positivity assumption in the causal analysis of observational data: Consequences and statistical approaches.” Pharmacoepidemiology and drug safety, vol. 30, no. 11, 2021, pp. 1471–1485. http://access.bl.uk/ark:/81055/vdc_100142343533.0x00003a