@misc{indiciae22f9dfd0bd3a,
  title = {[An effective method to reduce bias between two compared groups: propensity score].},
  author = {Shou-jun Zhao and Yong Zhang and Xuan-yi Wang and Yan-ning Gao},
  year = {2003},
  url = {https://pubmed.ncbi.nlm.nih.gov/12848923/},
  note = {Source identifier: 12848923}
}