TY  - RPRT
TI  - Summing up evidence: one answer is not always enough.
AU  - J Lau
AU  - J P Ioannidis
AU  - C H Schmid
PY  - 1998
DO  - 10.1016/s0140-6736(97)08468-7
UR  - https://pubmed.ncbi.nlm.nih.gov/9439507/
ID  - 9439507
ER  -