title: Authors' response.
authors.affiliation: Regional Medical Research Centre, NE Region (ICMR), Dibrugarh 786 001, Assam, India.
authors.forename: Prasanta Kr
authors.initials: PK
authors.lastname: Borah
authors.affiliation: Regional Medical Research Centre, NE Region (ICMR), Dibrugarh 786 001, Assam, India.
authors.forename: Utpala
authors.initials: U
authors.lastname: Devi
authors.affiliation: Regional Medical Research Centre, NE Region (ICMR), Dibrugarh 786 001, Assam, India.
authors.forename: Dipankar
authors.initials: D
authors.lastname: Biswas
authors.affiliation: Assam Medical College & Hospital, Dibrugarh 786 002, Assam, India.
authors.forename: Hem C
authors.initials: HC
authors.lastname: Kalita
authors.affiliation: Indian Council of Medical Research, Ansari Nagar, New Delhi, India.
authors.forename: Meenakshi
authors.initials: M
authors.lastname: Sharma
authors.affiliation: Regional Medical Research Centre, NE Region (ICMR), Dibrugarh 786 001, Assam, India.
authors.forename: Jagadish
authors.initials: J
authors.lastname: Mahanta