TY  - RPRT
TI  - Estimating risk difference in multicenter studies under baseline-risk heterogeneity.
AU  - D Böhning
AU  - J Sarol
PY  - 2000
DO  - 10.1111/j.0006-341x.2000.00304.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10783812/
ID  - 10783812
ER  -