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Paul J. Fitzgerald is a a behavioral neuroscientist in the United States. Paul has a Ph.D. in neuroscience from Johns Hopkins University, where he studied somatosensory cortex in the Steven Hsiao lab. After that,he was a neuroscience postdoc at the National Institutes of Health in the United States for four years, where he studied mouse models of mental illness in the Andrew Holmes lab.

Currently, He is a postdoctoral fellow at Texas A&M University, working in the learning and memory lab of Stephen Maren.

Paul has a general interest in neurotransmitter systems, especially norepinephrine and drugs that affect it. Since 2009 he has published a series of review articles suggesting that elevated norepinephrine signaling is a factor in causing a variety of diseases, including various types of cancer. He thinks that metronomic chemotherapy, in combination with norepinephrine transmission reducing drugs such as beta blockers, is an innovative approach to treating cancer that demands further scientific inquiry.