From 2007 to 2010, she was a Robert Wood Johnson Health Policy Fellow. While at CBO, Dr. Fox provided a clinical perspective and guidance on several projects and cost analyses. Working with several staff members, she helped to examine the potential effectiveness of screening and preventive services in Medicare and evidence on the outcomes of alternative strategies for coordinating care in that program. Dr. Fox was the lead analyst in preparing a draft report on the dramatic rise in obesity among children, its causes, and its short- and long-term consequences. The paper outlined changes in lifestyle and other nonmedical interventions to reduce or prevent obesity among children.