@misc{indiciae19b89b61e3aa,
  title = {[Heart block].},
  author = {A Alvarez and L Sáenz and C Oliveras and F Sánchez},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2129720/},
  note = {Source identifier: 2129720}
}