1. Division of Haematology, Department of Human Pathology in Adulthood and Childhood “Gaetano Barresi”, University of Messina, Messina, Italy
2. COVID Centre AOU Policlinic G. Martino, Messina, Italy
3. Allergology Clinic, Clinica San Carlo, Paderno Dugnano, Milan, Italy
4. Department of Translational and Precision Medicine, Sapienza University, Rome, Italy
5. Department of Clinical and Experimental Medicine, School and Operative Unit of Allergy and Clinical Immunology, University of Messina, Messina, Italy