Alves C. X., de Brito N. J. N., Vermeulen K. M., Lopes M. M. G. D., França M. C., Bruno S. S., Almeida M. das G., and Brandão-Neto J. “Serum Zinc Reference Intervals and Its Relationship With Dietary, Functional, and Biochemical Indicators in 6- to 9-Year-Old Healthy Children”. Food & Nutrition Research, vol. 60, Apr. 2016, doi:10.3402/fnr.v60.30157.