1. Fenske NA, Lober CW. Structural and functional changes of normal aging skin. J Am Acad Dermatol. 1986; 15:571–585.
2. Vidal P, Berner JE, Castillo P, Rochefort G, Loubies R. Descended mouth corner: an ignored but needed feature of facial rejuvenation. Arch Plast Surg. 2013; 40:783–786.
3. Lee JW, Cho BC, Lee KY. Direct brow lift combined with suspension of the orbicularis oculi muscle. Arch Plast Surg. 2013; 40:603–609.
4. Lee SY, Sung KY. Subcision using a spinal needle cannula and a thread for prominent nasolabial fold correction. Arch Plast Surg. 2013; 40:256–258.
5. Lee SK, Kim DW, Dhong ES, Park SH, Yoon ES. Facial soft tissue augmentation using autologous fat mixed with stromal vascular fraction. Arch Plast Surg. 2012; 39:534–539.
6. Salibian AA, Widgerow AD, Abrouk M, Evans GR. Stem cells in plastic surgery: a review of current clinical and translational applications. Arch Plast Surg. 2013; 40:666–675.
7. Shin KC, Bae TH, Kim WS, Kim HK. Usefulness of gold thread implantation for crow's feet. Arch Plast Surg. 2012; 39:42–45.
8. Kanchwala SK, Holloway L, Bucky LP. Reliable soft tissue augmentation: a clinical comparison of injectable soft-tissue fillers for facial-volume augmentation. Ann Plast Surg. 2005; 55:30–35. discussion 5.
9. Kaufman MR, Miller TA, Huang C, Roostaeian J, Wasson KL, Ashley RK, Bradley JP. Autologous fat transfer for facial recontouring: is there science behind the art? Plast Reconstr Surg. 2007; 119:2287–2296.
10. Murray CA, Zloty D, Warshawski L. The evolution of soft tissue fillers in clinical practice. Dermatol Clin. 2005; 23:343–363.
11. Watson W, Kaye RL, Klein A, Stegman S. Injectable collagen: a clinical overview. Cutis. 1983; 31:543–546.
12. Baumann L, Kaufman J, Saghari S. Collagen fillers. Dermatol Ther. 2006; 19:134–140.
13. Andre P, Lowe NJ, Parc A, Clerici TH, Zimmermann U. Adverse reactions to dermal fillers: a review of European experiences. J Cosmet Laser Ther. 2005; 7:171–176.
14. Lavker RM. Structural alterations in exposed and unexposed aged skin. J Invest Dermatol. 1979; 73:59–66.
15. Griffiths CE, Russman AN, Majmudar G, Singer RS, Hamilton TA, Voorhees JJ. Restoration of collagen formation in photodamaged human skin by tretinoin (retinoic acid). N Engl J Med. 1993; 329:530–535.
16. Cockerham K, Hsu VJ. Collagen-based dermal fillers: past, present, future. Facial Plast Surg. 2009; 25:106–113.
17. Klein AW, Elson ML. The history of substances for soft tissue augmentation. Dermatol Surg. 2000; 26:1096–1105.
18. Downie J, Mao Z, Rachel Lo TW, Barry S, Bock M, Siebert JP, Bowman A, Ayoub A. A double-blind, clinical evaluation of facial augmentation treatments: a comparison of PRI 1, PRI 2, Zyplast and Perlane. J Plast Reconstr Aesthet Surg. 2009; 62:1636–1643.
19. Patel KM, Nahabedian MY, Gatti M, Bhanot P. Indications and outcomes following complex abdominal reconstruction with component separation combined with porcine acellular dermal matrix reinforcement. Ann Plast Surg. 2012; 69:394–398.
20. Alperin M. Collagen scaffold: a treatment for large mesh exposure following vaginal prolapse repair. Int Urogynecol J. 2014.
21. Giannotti S, Ghilardi M, Dell'osso G, Magistrelli L, Bugelli G, Di Rollo F, Ricci G, Calabrese R, Siciliano G, Guido G. Study of the porcine dermal collagen repair patch in morpho-functional recovery of the rotator cuff after minimum follow-up of 2.5 Years. Surg Technol Int. 2014; 24:348–352.
22. Narins RS, Brandt FS, Lorenc ZP, Maas CS, Monheit GD, Smith SR. Twelve-month persistency of a novel ribose-cross-linked collagen dermal filler. Dermatol Surg. 2008; 34:S31–S39.
23. Goldberg DJ. Correction of tear trough deformity with novel porcine collagen dermal filler (Dermicol-P35). Aesthet Surg J. 2009; 29:S9–S11.
24. Lorenc ZP, Nir E, Azachi M. Characterization of physical properties and histologic evaluation of injectable Dermicol-p35 porcine-collagen dermal filler. Plast Reconstr Surg. 2010; 125:1805–1813.
25. Braun M, Braun S. Nodule formation following lip augmentation using porcine collagen-derived filler. J Drugs Dermatol. 2008; 7:579–581.
26. Klein AW. Skin filling: Collagen and other injectables of the skin. Dermatol Clin. 2001; 19:491–508. ix
27. Narins RS, Brandt F, Leyden J, Lorenc ZP, Rubin M, Smith S. A randomized, double-blind, multicenter comparison of the efficacy and tolerability of Restylane versus Zyplast for the correction of nasolabial folds. Dermatol Surg. 2003; 29:588–595.
28. Monstrey SJ, Pitaru S, Hamdi M, Van Landuyt K, Blondeel P, Shiri J, Goldlust A, Shoshani D. A two-stage phase I trial of Evolence30 collagen for soft-tissue contour correction. Plast Reconstr Surg. 2007; 120:303–311.