Nicole Ellis, MSW, LSW Nicole Ellis, MSW, LSW, is a proton therapy social worker in the Cancer Center at The Children’s Hospital of Philadelphia. Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467) Education and Training Additional TrainingUniversity of Pennsylvania Undergraduate DegreeUniversity of Delaware Titles and Academic Titles Proton Social Worker Departments and Services Cancer CenterPediatric Proton Therapy Center