Diagnosis of COVID-19 by Serology in Admitted Patients with Negative RT-PCR Assay - Rezaei, Mitra; Baghaei, Parvaneh; Sadr, Makan; Moniri, Afshin; Babamahmoodi, Abdolreza; Qadimi, Somayeh; Porabdollah, Mihan; Nadji, Seyed Alireza; Tabarsi, Payam; Marjani, Majid (Iranian Journal of Allergy, Asthma and Immunology, 2021)