Manoj K Panigrahi1, Rajaram Manju2, Saka Vinod Kumar2, Pampa C Toi3. 1. All India Institute of Medical Sciences, Odisha, India. manoj_kp99@rediffmail.com. 2. Department of Pulmonary Medicine. 3. Department of Pathology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.