1. US Food and Drug Administration. FDA Update on the Safety of Silicone Gel-Filled Breast Implants. 2011. http://www.fda.gov/downloads/MedicalDevices/ProductsandMedicalProcedures/ImplantsandProsthetics/BreastImplants/UCM260090.pdf
2. Medicines and Healthcare Products Regulatory Agency (MHRA). Types of breast implants. http://www.mhra.gov.uk/Safetyinformation/Generalsafetyinformationandadvice/Product-specificinformationandadvice/Product-specificinformationandadvice-A-F/Breastimplants/Typesofbreastimplants/index.htm
3. Polyurethane-coated silicone gel breast implants used for 18 years;Vasquez;Aesthetic Plast Surg.,2007
4. Polyurethane foam breast implants;Fleming,2012
5. Capsular contracture—what are the risk factors? A 14-year series of 1400 consecutive augmentations;Dancey;J Plast Reconstr Aesthetic Surg.,2012