Yield of Severe Acute Respiratory Syndrome Coronavirus 2 Lower Respiratory Tract Testing After a Negative Nasopharyngeal Test Among Hospitalized Persons Under Investigation for Coronavirus Disease 2019. - Egbuonu, Kenechukwu; Hyle, Emily P; Hurtado, Rocio M; Alba, George A; Zachary, Kimon C; Branda, John A; Hibbert, Kathryn A; Hooper, David C; Shenoy, Erica S; Turbett, Sarah E; Dugdale, Caitlin M (Open Forum Infectious Diseases, 2021)