TY  - RPRT
TI  - How to appraise a prognostic study.
AU  - Kenneth Mak
AU  - Cheng Kiong Kum
PY  - 2005
DO  - 10.1007/s00268-005-7914-x
UR  - https://pubmed.ncbi.nlm.nih.gov/15830117/
ID  - 15830117
ER  -