Zerbinati, N.; Lotti, T.; Monticelli, D.; Rauso, R.; González-Isaza, P.; D’Este, E.; Calligaro, A.; Sommatis, S.; Maccario, C.; Mocchi, R.; Lotti, J.; Wollina, U.; Tchernev, G.; França, K. In Vitro Evaluation of the Biosafety of Hyaluronic Acid PEG Cross-Linked With Micromolecules of Calcium Hydroxyapatite in Low Concentration. Open Access Maced J Med Sci 2018, 6, 15-19.