Considering the fact that January 2020 Elsevier has produced a COVID-19 source centre with no cost info in English and Mandarin about the novel coronavirus COVID-19. The COVID-19 useful resource centre is hosted on Elsevier Connect, the organization's community information and information Internet site. Elsevier hereby grants authorization for making https://www.youtube.com/watch?v=bEpgQCmGRSY