@misc{indiciaeade2cd7d9c51,
  title = {Hormonal screening for twin pregnancies.},
  author = {L Grennert and P H Persson and G Gennser and S Kullander and J Thorell},
  year = {1976},
  doi = {10.1016/s0140-6736(76)91199-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/63089/},
  note = {Source identifier: 63089}
}