INDIANAPOLIS (AP) — Four teams, four drug-testing policies.

Players at Kentucky, Wisconsin, Michigan State and Duke operated under the same rules on their road to the Final Four this season — except when it came to the frequency of their doping tests and the penalties they faced for failing.

All players fall under the umbrella of the NCAA drug-testing program, which tests urine for performance-enhancing and recreational drugs at its championship events and for PEDs during infrequent visits to campus the rest of the year. The main source of deterrence? The programs in place at individual schools.

There are some small changes up for consideration. However, even if those changes occur, the standards could be as varied as the 351 Division I universities.

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.