Muthu Valliappan, Khaire Niranjan Shiwaji, Varma Subhash
Department of Pulmonary Medicine, Post Graduate Institute of Medical Education & Research, Sector 12, Chandigarh, India, 160012,
Clin Rheumatol. 2014 Apr;33(4):591-2. doi: 10.1007/s10067-014-2510-9. Epub 2014 Feb 5.