TY - RPRT TI - Confidence intervals for the risk ratio under cluster sampling based on the beta-binomial model. AU - K J Lui AU - J A Mayer AU - L Eckhardt PY - 2000 DO - 10.1002/1097-0258(20001115)19:21<2933::aid-sim591>3.0.co;2-q UR - https://pubmed.ncbi.nlm.nih.gov/11042624/ ID - 11042624 ER -