@misc{indiciaeaf6ad3864589,
  title = {Multipractice studies: how representative are the participating doctors?},
  author = {C E Mabeck and R Vejlsgaard},
  year = {1980},
  url = {https://pubmed.ncbi.nlm.nih.gov/7441623/},
  note = {Source identifier: 7441623}
}