Wan Tang's primary research focuses on: statistical methodological development in fields such as longitudinal data analysis, missing data, nonparametric smoothing methods, and causal inferences, and their application in biomedical studies, especially in psychiatry and behavioral research.

Dr. Hua He is a Professor of Biostatistics with research interests in the fields of mixture population modeling, causal inference, longitudinal data analysis, semi-parametric and nonparametric inference, ROC analysis, social network analysis, and applications of statistical methods to a wide range of disciplines in medical and health research.