title: Authors' reply.
authors.affiliation: Department of Dermatology, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India. E-mail: tpvetrichevvel@gmail.com.
authors.forename: Thirthar Palanivelu
authors.initials: TP
authors.lastname: Vetrichevvel
authors.forename: Rangarajan
authors.initials: R
authors.lastname: Sudha
authors.forename: Subramanyam
authors.initials: S
authors.lastname: Shobana
authors.forename: Sankarasubramanian
authors.initials: S
authors.lastname: Anandan