1. Dermal filler agents;Johl;a practical review,2006
2. Adverse reactions to injectable soft tissue permanent fillers;Christensen;Aesthetic Plast Surg,2005
3. Adverse reactions to dermal fillers;Lowe;review,2005
4. Adverse reactions to dermal fillers;Andre;a review of European experiences,2005
5. The histological aspects of filler complications;Zimmermann;Semin Cutan Med Surg,2004