Author Contributions: Drs de Jong and van Leeuwen had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: de Jong, Vasmel, de Boer, van Leeuwen.
Acquisition of data: de Jong, Vasmel, de Boer, Verhave, Barbé, Casparie, van Leeuwen.
Analysis and interpretation of data: de Jong, Vasmel, de Boer, van Leeuwen.
Drafting of the manuscript: de Jong, Vasmel, de Boer, van Leeuwen.
Critical revision of the manuscript for important intellectual content: de Boer, Verhave, Barbé, Casparie.
Statistical analysis: van Leeuwen.
Administrative, technical, or material support: de Boer, Verhave, Barbé, Casparie.
Study supervision: de Jong.
Financial Disclosures: None reported.
Funding/Support: This study was supported by the Netherlands Cancer Institute without external funding.
Role of the Sponsor: The Netherlands Cancer Institute did not participate in the design and conduct of the study, in the collection of data, analysis, and interpretation of the data, or in the preparation, review, or approval of the manuscript.
Additional Contributions: We thank Carla Wauters, MD, Canisius-Wilhelmina Hospital, Nijmegen, the Netherlands, for her keen attention to this unique feature in patients with breast implants and providing patient material for this study and Willem Kolkman, MSc, Department of Epidemiology, the Netherlands Cancer Institute, Amsterdam, for statistical support. We thank the many clinicians and pathologists who provided clinical information and pathological data on all patients. None of these acknowledged contributors have received any financial compensation.