Examlex
Use the database tables below to answer the following questions.
-Which field in the SALES ORDERS table is a foreign key?
Lymphocyte Levels
The concentration of lymphocytes, a type of white blood cell, in the blood, which is a key indicator of the immune system's health.
Oxytocin Levels
The concentration of oxytocin, a hormone associated with social bonding, trust, and empathy, in one's bloodstream.
Cortisol Levels
The amount of cortisol, a hormone released by the adrenal glands, in the blood, which can increase in response to stress or low blood-glucose concentration.
Serotonin Levels
The concentration of serotonin, a key neurotransmitter affecting mood, anxiety, and happiness, within the nervous system.
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