| http://www.w3.org/ns/prov#value | - Accordingly, the hydrogel may be for use in facial cosmetic or reconstructive surgery and have a complex viscosity of about 2 to 20 Pas, preferably about 2 to 18 Pas, such as about 2 to 15 Pas or 2 to 10 Pas, more preferably 2 to 7 Pas, most preferably 3 to 5 Pas.
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