# Serum levels of chemical elements in esophageal squamous cell carcinoma in Anyang, China: a case-control study based on machine learning methods

> Research article (BMJ Open, 2017) · cited 12× · AI/ML

**Wikidata**: [openalex:W2756925100](https://www.wikidata.org/wiki/openalex:W2756925100)  
**Source**: https://4ort.xyz/entity/serum-levels-of-chemical-elements-in-esophageal-squamous-cell-carcinoma-in-anyang-china-a-case-control-study-based-on-ma