Kelsy Stenger Kelsy Stenger is the coordinator of the Mobile Safety Center with the Injury Prevention Program at Children's Hospital of Philadelphia. Locations: Main Campus Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467) Education and Training Board CertificationChild Passenger Safety Technician Instructor (CPSTI) Titles and Academic Titles Mobile Safety Center CoordinatorChild Passenger Safety Technician Departments and Services Injury Prevention Program