Y Gayatri Devi1, N Usha Rani2, G Sambasiva Rao3, M Narayana4, B Dileep Kumar4 1Assistant Professor, Department of Pulmonary Medicine, Government Hospital for Chest and Communicable Diseases, Visakhpatnam, Andhra Pradesh, India, 2Associate Professor, Department of Pulmonary Medicine, Government Hospital for Chest and Communicable Diseases, Andhra Pradesh, Visakhpatnam, India, 3Professor and Head...