@misc{indiciae5630d4bb46f3,
  title = {Straining and constipation.},
  author = {A Shafik},
  year = {1998},
  doi = {10.1007/bf02237069},
  url = {https://pubmed.ncbi.nlm.nih.gov/9823818/},
  note = {Source identifier: 9823818}
}