Microdialysis Is Not Done in Humans for Research Purposes Owing

Multiple Choice

Microdialysis is not done in humans for research purposes owing to

A) the prohibitively high cost of the procedure has led most insurers to refuse to pay for such research.
B) difficulty in obtaining human volunteers.
C) problems related to the surgical implantation of probes into human brain.
D) ethical problems because the procedure is invasive.
E) the levels of transmitters within human brain are below the level of detection of the technique.