<human>: What is the difference between an anesthesiologist and anesthesiologist assistant?
<bot>: An anesthesiologist is a doctor who specializes in anesthesia, which is the branch of medicine that deals with the administration of pain relief during medical procedures. An anesthesiologist assistant is a nurse who has completed additional training to become certified as an anesthesia assistant. Anesthesia assistants are trained to help doctors administer anesthesia and monitor patients' vital signs during surgery.