HA-MA was dispersed in PBS and kept at 4 °C until complete dissolution. HA-MA solution was mixed with a 1% w/v lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) stock solution to create a 2% w/v HA-MA and 0.05% w/v LAP solution and crosslinked by controlled photoexposure in the UV-A range (Omnicure Series 100, 400 nm wavelength, 9.55 mW cm−2).