1. Department of Pulmonology and Allergology, State University of Medicine and Pharmacy “Nicolae Testemitanu”, MD-2004 Chisinau, Moldova
2. Division of Immunology, Immunity to Infection and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester M13 9PL, UK
3. Department of Pulmonology, Semmelweis University, 1083 Budapest, Hungary