1 Division of Clinical Infectious Diseases, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
2 Department of Pathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
3 Division of Clinical Infectious Diseases, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India. Electronic address: hs.30.singh@gmail.com.
4 Department of Neurosurgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
5 Department of Medical Microbiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.