references
1.Mundada, P., Kohler, R., Boudabbous, S., Toutous Trellu, L., Platon, A., & Becker, M. (2017). Injectable facial fillers: imaging features, complications, and diagnostic pitfalls at MRI and PET CT. Insights into imaging, 8(6), 557–572. https://doi.org/10.1007/s13244-017-0575-0
2. Prasetyo, A. D., Prager, W., Rubin, M. G., Moretti, E. A., & Nikolis, A. (2016). Hyaluronic acid fillers with cohesive polydensified matrix for soft-tissue augmentation and rejuvenation: a literature review. Clinical, cosmetic and investigational dermatology, 9, 257–280. https://doi.org/10.2147/CCID.S106551