The following data are obtained from spirometry and a He dilution FRC test (all values have been corrected to BTPS) : 
What is the patient's RV/TLC ratio?
Definitions:
Import
The process of bringing data from an external file into a software application or database system.
CSV File
A plain text file that uses a specific structure to arrange tabular data, where commas separate values.
Access
Microsoft's database management solution that merges the relational functionalities of the Microsoft Jet Database Engine with a user-friendly graphical interface and development tools for software.
Linked Table
A table in a database that maintains a live connection to data in another source, allowing real-time updates and queries.
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