TY - RPRT TI - Population-averaged and cluster-specific models for clustered ordinal response data. AU - T R Ten Have AU - J R Landis AU - J Hartzel PY - 1996 DO - 10.1002/(sici)1097-0258(19961215)15:23<2573::aid-sim389>3.0.co;2-o UR - https://pubmed.ncbi.nlm.nih.gov/8961464/ ID - 8961464 ER -