Washington University School of Medicine



photo of WERC director Daniel Mamah

Daniel Mamah, MD, MPE

Dr. Mamah is an Associate Professor in the Department of Psychiatry at Washington University School of Medicine in St. Louis and the Director of WERC. He graduated from Semmelweis Medical School in Budapest, Hungary and completed his psychiatry residency at Washington University. He did an NIMH research fellowship in psychiatric epidemiology and biostatistics at Washington University, where he obtained the degree of Master of Psychiatric Epidemiology (MPE).

Dr. Mamah was the founding President of the Missouri Psychiatric Association and a past President of the Eastern Missouri Psychiatric Society. He has previously served on the Diagnostic and Statistical Manual of Mental Disorders – Fifth Edition (DSM-5) Task Force, overseeing the development of DSM-5. He is a recipient of multiple grants from the National Institute of Mental Health (NIMH), a NARSAD Young Investigator Award recipient, and the Biobehavioral Award for Innovative New Scientists (BRAINS) recipient from the NIMH. Dr. Mamah is a Distinguished Fellow of the American Psychiatric Association (DFAPA).

Treatment and Assessment Team

photo of Clinical Research Coordinator Christina Pritchard

Christina Pritchard, MSW, LMSW

Clinical Coordinator II

Christina graduated from the University of Missouri – St. Louis with a BS in Psychology, received her MSW from the University of Missouri – St. Louis, and obtained her LMSW in the state of Missouri. Christina worked in the mental health field before transitioning full-time to Washington University’s Department of Psychiatry. She is the primary clinical coordinator and case manager at WERC.

photo of Staff Therapist Ayleen Gomez

Ayleen Gomez Lopez, MA, LPC

Staff Therapist

Ayleen graduated with her BA in Psychology from Florida International University in Miami. She later obtained her MA in Counseling and Guidance from the University of Missouri – Kansas City. Ayleen has been a Licensed Professional Counselor (LPC) in Missouri since 2014. She has extensive experience working in various settings, including outpatient behavioral health, substance use treatment, crisis work, and community mental health. Ayleen is the primary clinical therapist at WERC and provides various evidence-based treatments, including Cognitive Behavioral Therapy (CBT) and Person-Centered Therapy.

photo of Carli Ryan

Carli Ryan, MSW

Clinical Coordinator

Carli graduated from Washington University in St. Louis with her B.A. in Cognitive Neuroscience. She continued at WUSTL, receiving her M.S.W. with a concentration in Mental Health from the Brown School of Social Work. Her previous experience includes work in substance abuse treatment and domestic violence. Carli is the Supported Education and Employment Specialist at WERC, as well as the Coordinator of the ProNET research study.

photo of Selena

ShingShiun (Selena) Chen

Neuroimaging Engineer

Selena graduated from Chung Yuan Christian University in Taiwan with her B.S. in Electronic Engineering and obtained her M.S. in Electrical Engineering from Auburn University. She is interested in Digital Signal and Image Processing, Machine Learning, Deep Learning, and Data Analysis. Her work currently focuses on the development of biomarker identification for psychotic disorders (such as schizophrenia and bipolar disorder) via machine learning techniques to develop new clinically validated diagnostic techniques.


photo of Leopoldo Cabassa

Leopoldo Cabassa, PhD

Associate Professor

Dr. Cabassa is an Associate Professor at the Brown School at Washington University in St. Louis. His work focuses on improving physical and mental health care for underserved communities, and investigating racial/ethnic disparities in health care. Dr. Cabassa is co-leading an NIMH effort aiming to improve care and outcomes for those affected by first-episode psychosis in Chile.

photo of Rita Haddad

Rita Haddad, MD

Instructor in Psychiatry

Dr. Haddad is an Instructor in Psychiatry at Washington University School of Medicine in St. Louis. Her areas of clinical interest are schizophrenia and other psychotic disorders. Dr. Haddad is investigating methods of improving cognition in psychosis using transcranial magnetic stimulation (TMS).

photo of Staff Therapist Eric Lenze

Eric Lenze, MD

Wallace & Lucille Renard Professor of Psychiatry

Dr. Lenze is the Wallace & Lucille Renard Professor of Psychiatry at Washington University School of Medicine. He is also Director and Principal Investigator of the Healthy Mind Lab. Dr. Lenze’s work includes research on healthy aging (MEDEX) and treatment-resistant depression (Optimum).

photo of Emily Mukherji

Emily Mukherji, MD

Assistant Professor of Psychiatry

Dr. Mukherji is an Assistant Professor in Psychiatry at Washington University School of Medicine. She completed her psychiatry residency at Harvard’s Massachusetts General/McLean Hospitals in Boston, and worked with their early psychosis program. She is the Director of the adult outpatient psychiatry clinic at Barnes Jewish Hospital.

photo of Ginger Nicol

Ginger Nicol, MD

Associate Professor of Psychiatry

Dr. Nicol is a board-certified child and adolescent psychiatrist and Associate Professor of Psychiatry at Washington University School of Medicine. Dr.Nicol research focus includes developing and testing new therapies to help children and adults with mental illness achieve a healthy weight and improved metabolic outcomes.

photo of Angela Reiersen

Angela Reiersen, MD, MPE

Associate Prof of Psychiatry (Child Psychiatry)

Dr. Reiersen is an Associate Professor of Psychiatry (Child) at Washington University School of Medicine. She is also the Director of the First Contact Assessment Service, which evaluate children who are showing signs of early psychosis, or have genetic or neurodevelopmental conditions with psychiatric symptoms.