title: Diffuse melanonychia as a clue to vitamin B12 deficiency.
authors.affiliation: Senior Resident, Department of Medicine, University College of Medical Sciences (University of Delhi) and Guru Teg Bahadur Hospital, Delhi, India drlaxmikantucms@gmail.com.
authors.forename: Laxmikant Ramkumarsingh
authors.initials: LR
authors.lastname: Tomar
authors.affiliation: Senior Resident, Department of Dermatology, University College of Medical Sciences (University of Delhi) and Guru Teg Bahadur Hospital, Delhi, India.
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Dhawan
authors.affiliation: Assistant Professor, Department of Pathology, University College of Medical Sciences (University of Delhi) and Guru Teg Bahadur Hospital, Delhi, India.
authors.forename: Sonal
authors.initials: S
authors.lastname: Sharma
authors.affiliation: Assistant Professor, Department of Medicine, University College of Medical Sciences (University of Delhi) and Guru Teg Bahadur Hospital, Delhi, India.
authors.forename: Amitesh
authors.initials: A
authors.lastname: Aggarwal
keywords: Megaloblastic; anaemia; melanonychia