@misc{indiciae9e762190233a,
  title = {Ensuring the comparability of comparison groups: is randomization enough?},
  author = {Vance W Berger and Sherri Weinstein},
  year = {2004},
  doi = {10.1016/j.cct.2004.04.001},
  url = {https://pubmed.ncbi.nlm.nih.gov/15465620/},
  note = {Source identifier: 15465620}
}