TY  - RPRT
TI  - Some design issues in a community intervention trial.
AU  - Ziding Feng
AU  - Beti Thompson
PY  - 2002
DO  - 10.1016/s0197-2456(02)00206-4
UR  - https://pubmed.ncbi.nlm.nih.gov/12161089/
ID  - 12161089
ER  -