@misc{indiciaec44e1a68f120,
  title = {Sampling the difficult-to-sample.},
  author = {J M Lepkowski},
  year = {1991},
  doi = {10.1093/jn/121.3.416},
  url = {https://pubmed.ncbi.nlm.nih.gov/2002412/},
  note = {Source identifier: 2002412}
}