1.Discuss the relationship among the members of the following groups of minerals: (1) sodium, chloride, and potassium; (2) calcium, phosphorus, and magnesium. Within each group, discuss how the minerals are related and how the body will react to a deficiency of the minerals vs. a toxicity. ​

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?