@misc{indiciaea471d2201311,
  title = {The problem of postural hypotension.},
  author = {J A Grunstein},
  year = {1974},
  doi = {10.1159/000245502},
  url = {https://pubmed.ncbi.nlm.nih.gov/4153138/},
  note = {Source identifier: 4153138}
}