# Estimation of causal effects of multiple treatments in healthcare database studies with rare outcomes

> Research article (Health Services and Outcomes Research Methodology, 2021) · cited 15× · AI/ML

**Wikidata**: [openalex:W3119598895](https://www.wikidata.org/wiki/openalex:W3119598895)  
**Source**: https://4ort.xyz/entity/estimation-of-causal-effects-of-multiple-treatments-in-healthcare-database-studies-with-rare-outcomes