1. Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
2. Rajan Babu Institute of Pulmonary Medicine and Tuberculosis, Delhi, India
3. Rajiv Gandhi Cancer Institute & Research Centre, Delhi, India
4. Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands
5. Radboud University Medical Centre, Nijmegen, The Netherlands