title: Patterns of Care Studies: Past, Present, and Future.
abstract: The Patterns of Care Study in Radiation Oncology (PCS) has existed for 25 years. This overview details the basic principles that have guided the study from its inception to the present and defines the future role for the PCS.
authors.affiliation: Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA, USA
authors.initials: GE
authors.lastname: Hanks
authors.initials: LR
authors.lastname: Coia
authors.initials: J
authors.lastname: Curry