Oral lesions and saliva alterations of COVID-19 patients in an intensive care unit: a retrospective study - Eduardo, Fernanda de Paula; Bezinelli, Leticia Mello; Gobbi, Marcella Ferreira; Bergamin, Livia Goron; Carvalho, Danielle Lima Correa de; Corrêa, Luciana (Special Care in Dentistry, 2022)