** Diagnostic tests provider's XGN.O shares rise 2.1% to
$17.96
** XGN says it will collaborate with Emory University on a
new study about the long-term effects of COVID-19 infection in
the development of autoimmune diseases such as lupus and
rheumatoid arthritis urn:newsml:reuters.com:*:nGNX4JC7v0
** CO says study will assess the emergence of automimmune
disease biomarkers in mild to moderate COVID patients, among
several critical patient groups
** Stock had gained 33.3% this year as of its last close
(Reporting by Amruta Khandekar)
((Amruta.Khandekar@thomsonreuters.com;))