1. Department of Pulmonary Medicine, Kasturba Hospital, Kasturba Medical College, Manipal University, Manipal 576 104, India
2. Department of Radiodiagnosis and Imaging, Kasturba Hospital, Kasturba Medical College, Manipal University, Manipal 576 104, India
3. Department of Cardiology, Kasturba Hospital, Kasturba Medical College, Manipal University, Manipal 576 104, India
4. Department of Anaesthesia, Kasturba Hospital, Kasturba Medical College, Manipal University, Manipal 576 104, India