Charles P. Quesenberry, PhD, is a Associate Director, Biostatistics at the Kaiser Permanente Northern California Division of Research. He obtained his doctorate in biostatistics at the University of California, Berkeley, and has worked at the Division of Research since 1986. Dr. Quesenberry has been primarily involved with epidemiologic, statistical methods, and health services research projects relating to HIV/AIDS, Dementia, cognitive aging, hepatitis, obesity, health effects of air pollution, diabetes, cardiovascular disease, and cancer of the lung, breast, colon/rectum, and prostate. He is Lead Biostatistician and Kaiser Site PI for KHANDLE, STAR, LifeAfter90, and SOLID study.