TY  - RPRT
TI  - Meta-analyses involving cross-over trials: methodological issues.
AU  - Diana R Elbourne
AU  - Douglas G Altman
AU  - Julian P T Higgins
AU  - Francois Curtin
AU  - Helen V Worthington
AU  - Andy Vail
PY  - 2002
DO  - 10.1093/ije/31.1.140
UR  - https://pubmed.ncbi.nlm.nih.gov/11914310/
ID  - 11914310
ER  -