@article{pablosmendez1998-9438743,
  author  = {Pablos-Méndez, A. and Barr, R. G. and Shea, S.},
  title   = {{Run-in periods in randomized trials: implications for the application of results in clinical practice}},
  journal = {JAMA},
  year    = {1998},
  doi     = {10.1001/jama.279.3.222},
  pmid    = {9438743},
  url     = {https://doi.org/10.1001/jama.279.3.222}
}