1. Department of Pulmonary Medicine; Postgraduate Institute of Medical Education and Research; Chandigarh India
2. Department of Radiodiagnosis; Postgraduate Institute of Medical Education and Research; Chandigarh India
3. Department of Immunopathology; Postgraduate Institute of Medical Education and Research; Chandigarh India
4. Department of Medical Microbiology; Postgraduate Institute of Medical Education and Research; Chandigarh India