Dr. Guevara is the principal investigator on research grants evaluating health inequities in early childhood development and behavioral problems. He utilizes community-based participatory clinical trials involving parent advocacy groups, community organizations, and government agencies to test the effects of psychosocial interventions designed to provide parents with resources and tools to improve the care of their children.
Dr. Dowshen focuses on improving the health outcomes for adolescent and young adults (AYA) living with or at high risk for contracting HIV/AIDS and improving access and quality of care for gender expansive and transgender children and adolescents. She is particularly interested in developing and testing digital health interventions to reach, engage, and retain AYA in care.
Dr. Shults works to develop statistical methods for longitudinal data that include semi-parametric approaches to account for subject/cluster level associations and maximum likelihood-based approaches for simulation and analysis of discrete longitudinal outcomes that may have overdispersion.
Dr. Roizen's research program aims to understand non-calciometabolic effects of vitamin D and to use this understanding to design new therapeutic approaches to common diseases such as sarcopenia and obesity.
Dr. Lowenthal's work is focused on addressing health priorities for children in resource-limited settings. In addition to research projects she serves as research director for the Children's Hospital of Philadelphia Global Health Center, supporting junior researchers (and senior researchers newly working in international settings) to develop projects addressing other health priorities for children in resource-limited settings.