Which one of the following is a proper first-aid procedure? select one: a. rubbing frostbite gently b. applying ointment to a first degree burn c. lowing the head of a person suffering from heat exhaustion d. covering a person suffering from shock

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?