1. Manchester University NHS Foundation TrustManchester Academic Health Science CentreManchester, United Kingdom
2. Division of Infection, Immunity and Respiratory MedicineThe University of ManchesterManchester, United Kingdom
3. Section for Pulmonary DiseasesHerlev Gentofte HospitalHellerup, Denmarkand
4. Faculty of MedicineAlexandria UniversityAlexandria, Egypt