Columbia subject headings:
Pediatric ophthalmology.
Xerophthalmia--Diagnosis.
Xerophthalmia--Prevention.
Harvard subject headings:
Pediatric ophthalmology.
Xerophthalmia--Diagnosis.
Xerophthalmia--Prevention.
Princeton subject headings:
Pediatric ophthalmology.
Xerophthalmia--Diagnosis.
Xerophthalmia--Prevention.