Nattusamy Loganathan, Madan Karan, Nadarajah Jeyaseelan, Bhalla Ashu Seith
Department of Pulmonary Medicine and Sleep Disorders, All India Institute of Medical Sciences, New Delhi, India.
BMJ Case Rep. 2014 Jan 17;2014:bcr2013202617. doi: 10.1136/bcr-2013-202617.