# description
 A qualitative measure of the degree of exposure to the causative agent.  This includes concepts such as "low", "medium" and "high".  This quantifies how the quantity that was available to be administered to the target differs from typical or background levels of the substance.

# property[].description
Indicates that the code is abstract - only intended to be used as a selector for other concepts

# concept[].definition
A qualitative measure of the degree of exposure to the causative agent.  This includes concepts such as "low", "medium" and "high".  This quantifies how the quantity that was available to be administered to the target differs from typical or background levels of the substance.

# concept[].concept[].definition
Description: Exposure to an agent at a relatively high level above background.

# concept[].concept[].definition
Description: Exposure to an agent at a relatively low level above background.

# concept[].concept[].definition
Description: Exposure to an agent at a relatively moderate level above background.A