He is involved in teaching, student supervision, curriculum development and research. He has published widely and his interest lies in research that addresses unanswered questions in patient care as well as questions related to methods of research design and analysis used in Medicine. Thus his research focuses on patient care topics such as epidemiology, prognosis and treatments of disease as well as methodology especially that related to meta-analysis. He is the co-author of the DoiâThalib method for meta-analysis which was introduced in 2008 as an alternative to the random effects model.