404. That’s an error.

The requested URL /translate_c?depth=1&rurl=translate.google.ro&sl=en&sp=nmt4&tl=ro&u=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC21914/&xid=17259,15700022,15700186,15700191,15700256,15700259,15700262,15700265&usg=ALkJrhjyPlMOv9U_Abn9hiGArD1nZfRgbg was not found on this server. That’s all we know.