Actually they have. https://www.ncbi.nlm.nih.gov/pubmed/32074550 Google has blocked access to this one in its search but failed to do so on drive.
https://drive.google.com/file/d/186Bel9RqfsmEx55FDum4xY_IlWSHnGbj/view
“They” being the Chinese if you look at ncbi.nlm.nih site. Looks like the other is France.