Dr. Pei-kwei Tsay is currently an associate professor in the Department of Public Health of Chang Gung University. He graduated from the Institute of Statistics of Tsinghua University in Taiwan in 1997 with a PhD. After graduation, he served as a faculty member in the Department of Nursing and the Department of Public Health of Chang Gung University for 20 years. His research focuses on biological statistics, National Health Insurance Research Database analysis and pediatric cohort studies. Currently he is a statistical advisor and an Editorial Board member of Biomedical Journal cited by SCI with an impact factor 3.697.