TY - JOUR T1 - COVID-19: An unwelcome guest that won’t leave JF - Cleveland Clinic Journal of Medicine JO - Cleve Clin J Med SP - 254 LP - 255 DO - 10.3949/ccjm.88b.05021 VL - 88 IS - 5 AU - Brian F. Mandell Y1 - 2021/05/01 UR - http://www.ccjm.org/content/88/5/254.abstract N2 - ER -