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In addition, substitutions were limited to elements with similar electronic orbital characteristics, defined here as having the same dominant valence-orbital types with effectively identical electronic configurations near the band edges without introducing additional strongly correlated d or f states

CSCs are a population of cells within a tumor that possess the ability to self-renew, evade drug action, and reconstitute a heterogenous tumor (39)

Also, people with certain medical conditions, or who practice restrictive dietary regimes for health reasons, can become vitamin deficient, making supplements a necessity

The Effect of Glycyl-L-Histidyl-L-Lysine Copper Chelate on the Healing of Diabetic Ulcers: a Pilot Study