Corrigendum to 'Lignin nanoparticles as nano-spacers for tuning the viscoelasticity of cellulose nanofibril reinforced polyvinyl alcohol-borax hydrogel" [Eur. Polym. J. 112 (2019) 267–274]. (October 2019) - Bian, Huiyang; Jiao, Liang; Wang, Ruibin; Wang, Xiu; Zhu, Wenyuan; Dai, Hongqi