2024. The Use Penalized Quasi Likelihood (PQL) to Estimate Multilevel Binary Logistic Model to Identify the Factors of Anemia. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 54, 1 (Jan. 2024), 498–508. DOI:https://doi.org/10.55562/jrucs.v54i1.617.