Kozikowska, K.; Bartmiński, W.; Sybilski, A. Comparison of the Efficacy and Safety of Succrosomial Iron and Elementar Iron Supplementation to Treat Iron Deficiency and Iron Deficiency Anemia in Preschool Children (3-6 years): Protocol of a Randomized Clinical Trial. Clinical Medicine Insights 2022, 3, 330-337.