1. Pak CS, Lee J, Lee H, Jeong J, Kim EH, Jeong J, Choi H, Kim B, Oh S, Kim I, Heo CY. A Phase III, Randomized, Double-Blind, Matched-Pairs, Active-Controlled Clinical Trial and Preclinical Animal Study to Compare the Durability, Efficacy and Safety between Polynucleotide Filler and Hyaluronic Acid Filler in the Correction of Crow's Feet: A New Concept of Regenerative Filler. J Korean Med Sci. 2014; 29(Suppl 3):S201–S209. PMID:
25473210.