Corrigendum to '2D Sn-doped ZnO ultrathin nanosheet networks for enhanced acetone gas sensing application' [Ceramics International 43 (2019) 2418–2423]. Issue 4 (March 2020) - Al-Hadeethi, Yas; Umar, Ahmad; Al-Heniti, Saleh H.; Kumar, Rajesh; Kim, S.H.; Zhang, Xixiang; Raffah, Bahaaudin M.