id	keyword
mkg-42562	covid
mkg-42562	long
mkg-42562	covid-19
mkg-42562	patients
mkg-42562	periodontitis
mkg-42562	survivors
mkg-42562	gingivitis
mkg-42562	non
mkg-42562	oral
mkg-42562	symptoms
mkg-42562	distribution
mkg-42562	study
mkg-42562	figure
mkg-42562	acute