Which statement about blood disorders is true? O They are always acute or short lasting.
O They typically affect platelets and red and white blood cells.
O They only involve the malfunction of plasma components.
O They cannot be passed from one person to another.

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?