Correlation Study of Serum Levels of Vitamins A, D and E | IJGM - Dove Medical Press

Study of serum levels of vitamins A, D and E in children with recurrent respiratory tract infections of different ages and the correlation

Introduction Recurrent respiratory tract infections are a repeated disease caused by pathogenic microorganisms invading the respiratory tract and multiplying, and are divided into upper respiratory … [+13958 chars]

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