@misc{indiciaedb5e13b2feea,
  title = {The back-step method--method for obtaining unbiased population parameter estimates for ordered categorical data.},
  author = {Maria C Kjellsson and Siv Jönsson and Mats O Karlsson},
  year = {2004},
  doi = {10.1208/aapsj060319},
  url = {https://pubmed.ncbi.nlm.nih.gov/15760104/},
  note = {Source identifier: 15760104}
}