What does OI stand for?
OI stands for "orthostatic intolerance"
How to abbreviate "orthostatic intolerance"?
"orthostatic intolerance" can be abbreviated as OI
What is the meaning of OI abbreviation?
The meaning of OI abbreviation is "orthostatic intolerance"
What does OI mean?
OI as abbreviation means "orthostatic intolerance"
