1 Department of Internal Medicine, Rheumatology Division, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
2 Department of Nuclear Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
3 Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
4 Department of Internal Medicine, Rheumatology Division, Postgraduate Institute of Medical Education and Research, Chandigarh, India. Electronic address: [email protected].