The major targets of growth hormone are .

a. The blood vessels

b. The adrenal glands

c. The liver and gall bladder

d. Bones and skeletal muscles

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?