# Comparison of Different Case-Crossover Variants in Handling Exposure-Time Trend or Persistent-User Bias: Using Dipeptidyl Peptidase-4 Inhibitors and the Risk of Heart Failure as an Example

> Research article (Value in Health, 2019) · cited 10× · AI/ML

**Wikidata**: [openalex:W2982092707](https://www.wikidata.org/wiki/openalex:W2982092707)  
**Source**: https://4ort.xyz/entity/comparison-of-different-case-crossover-variants-in-handling-exposure-time-trend-or-persistent-user-bias-using-dipeptidyl