@misc{indiciaeff921cae708c,
  title = {Simple method for isolating free urinary catecholamines by boric acid gel chromatography.},
  author = {C F Gelijkens and A P De Leenheer},
  year = {1980},
  doi = {10.1016/s0378-4347(00)81401-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/7400267/},
  note = {Source identifier: 7400267}
}