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Photo of Bridget Callaghan, PhD
Bridget Callaghan, PhD
Assistant Professor, Department of Psychology, UCLA; Director, Brain and Body Lab, UCLA

Dr. Bridget Callaghan is an Assistant Professor in the Department of Psychology at UCLA where she directs the Brain and Body Lab. Her laboratory studies the impact of early adversity on the development of the brain, body, and behavior in humans, specifically focusing on limbic system function, learning and memory, the gastrointestinal microbiome, and how each of these systems interact. Her studies have shown that early adverse caregiving experiences are associated with changes at the level of the gastrointestinal microbiome and brain, and are related to mental health outcomes (e.g., anxiety). Building from these data, Dr. Callaghan is developing a health care app which uses gastrointestinal and somatic symptoms to predict anxiety risk in children, which she hopes to eventually deploy in primary healthcare settings. Funded through the National Institutes of Mental Health, Dr. Callaghan is currently running a 3-year longitudinal study examining mechanisms of change in the microbiome following caregiving adversity, and how such change is related to functional brain development. Through her work, Dr. Callaghan has received numerous honors, including the Association for Psychological Science’s Rising Star Award, a Young Investigator Award from the International Society for Developmental Psychobiology, fellowships from the American Australian Association, Sackler Institute for Developmental Psychobiology, Brain Behavior Research Foundation, and National Health and Medical Research Council of Australia, and is an elected board member of the International Society for Developmental Psychobiology.

Photo of Lin Chang, MD
Lin Chang, MD
Director, Functional GI Disroders Program, UCLA Oppenheimer Family Center for Neurobiology of Stress; Division of Digestive Diseases, David Geffen School of Medicine at UCLA

Lin Chang, MD, is a Professor of Medicine in the Department of Medicine, Division of Digestive Diseases, at the David Geffen School of Medicine at UCLA. She serves as the Co-Director of the Center for Neurobiology of Stress at the David Geffen School of Medicine at UCLA. She is also Director of the Digestive Health and Nutrition Clinic at UCLA. Dr. Chang’s clinical expertise is in functional gastrointestinal disorders which include irritable bowel syndrome (IBS), chronic constipation, and functional dyspepsia. Dr. Chang’s research is focused on the pathophysiology of IBS related to stress, sex differences, and neuroendocrine alterations and the treatment of IBS. She is a funded NIH-investigator studying the central and peripheral mechanisms underlying IBS.

She is the recipient of the Janssen Award in Gastroenterology for Basic or Clinical Research and the AGA Distinguished Clinician Award, Dr. Chang has authored more than 70 original research articles, 48 review articles, and 19 book chapters on her specialty interests and is a frequent speaker at national and international meetings. She is a fellow of the American Gastroenterological Association and American College of Gastroenterology, and a member of the Society for Neuroscience. Dr. Chang serves as an Associate Editor of the American Journal of Gastroenterology. She is a member of the Rome Foundation Board of Directors, the Rome IV Editorial Board and the Rome IV Functional Bowel Disorders Committee. She is President of the American Neurogastroenterology and Motility Society (ANMS). She served on the FDA GI Advisory Committee from 2005-2010 which she also chaired.

Photo of Wendy Cozen, DO, MPH
Wendy Cozen, DO, MPH
Professor of Preventive Medicine, Pathology; Director, Population Based Tissue Procurement Core, Keck School of Medicine of USC

Dr. Cozen’s areas of interest include the epidemiology of hematologic neoplasms, particularly Hodgkin’s disease, non-Hodgkin’s lymphoma and multiple myeloma. She is currently conducting several case-control studies examining various aspects of T-cell function, including V-Beta T-cell repertories, cytokine secretion and T-cell replication, as susceptibility phenotypes for Hodgkin’s disease and multiple myeloma in twins. In addition, Dr. Cozen is the medical epidemiologist for the USC Cancer Surveillance Program and has expertise in the areas of cancer surveillance, nosology and cancer cluster analysis.

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