TY  - RPRT
TI  - Multivariate survival analysis using piecewise gamma frailty.
AU  - M C Paik
AU  - W Y Tsai
AU  - R Ottman
PY  - 1994
UR  - https://pubmed.ncbi.nlm.nih.gov/7787010/
ID  - 7787010
ER  -