1 Department of Dermatology, Venereology and Leprology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
2 Department of Histopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
3 Clinical Immunology and Rheumatology Services, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.