Why might a medical professional prescribe narcotics to a patient?

How long does it take to recover from heat stroke

What are the two things that all sociologists do in their studies?

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?