TY  - RPRT
TI  - Systematic reviews: when is an update an update?
AU  - David Moher
AU  - Alexander Tsertsvadze
PY  - 2006
DO  - 10.1016/s0140-6736(06)68358-x
UR  - https://pubmed.ncbi.nlm.nih.gov/16546523/
ID  - 16546523
ER  -