Susan loves to read. she spends all her free time either hanging out with friends or reading books. she takes a bus to school. she is not much into sports either. which is the best combination of food for her lunch?

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?