1 Department of Oral Pathology and Microbiology, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India. Electronic address: viveknayyar0@gmail.com.
2 Department of Oral and Maxillofacial Surgery, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India. Electronic address: bhatt_krushna@yahoo.com.
3 Department of Pathology, All India Institute of Medical Sciences, New Delhi, India. Electronic address: aanchalkakkar@gmail.com.
4 Department of Oral Pathology and Microbiology, Fifth Floor, Centre for Dental Education and Research, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India. Electronic address: deepika1904@gmail.com.