@misc{indiciaecc19a629a80d,
  title = {Multivariate survival analysis using piecewise gamma frailty.},
  author = {M C Paik and W Y Tsai and R Ottman},
  year = {1994},
  url = {https://pubmed.ncbi.nlm.nih.gov/7787010/},
  note = {Source identifier: 7787010}
}