From the Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Financial assistance: none.
The authors declare no conflict of interest.
An informed consent has been obtained from the parents.
No reprints required.
No honorarium, grant, or other form of payment was given to anyone to produce the manuscript.
Correspondence: Surjit Singh, MD, DCH (Lon.), FRCP (Lon.), FRCPH (Lon.), FIAP, FICAAI, FAMS, Department of Pediatrics, Advanced Pediatrics Centre, PGIMER, Chandigarh 160012, India. E-mail: firstname.lastname@example.org.