The study of how genes affect a person's response to drugs.

Area between the chest and the hips that contains the stomach, small intestine, large intestine, liver, gall bladder, pancreas, and spleen.

A helpful, protective response.

Nerve fibers (usually sensory) that carry impulses from an organ or tissue toward the brain and spinal cord (central nervous system), or the information processing centers of the enteric nervous syste [..]

Absence of nerve cells.

Pain due to stimuli that do not normally provoke pain.

Health services provided in a doctor's office, or on an outpatient basis.

The lowermost portion of the large intestine.

Any leakage of liquid or solid stool or excessive leakage of gas.

Reattachment of two portions of bowel.