Karmakar Saurabh, Chaudhuri Tamojit, Nath Alok, Neyaz Zafar
Department of Pulmonary Medicine, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India. E-mail:
N Am J Med Sci. 2013 Jan;5(1):72-4. doi: 10.4103/1947-2714.106218.