@misc{indiciae9555657c26bc,
  title = {Statistics for clinicians. 6. Comparing two samples (the two-sample t test).},
  author = {P C O'Brien and M A Shampo},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7015029/},
  note = {Source identifier: 7015029}
}