What Clinical Trials are at phase IV

Does anybody know of a clinical trial for HCV genotype 1b that has made it to phase III or IV?
Where can I get such information?

[FlGuy]

play around with varying search criteria at clinicaltrials.gov.  As a peice of criteria you might consider "hepatitis c'

[Tibbar62]

thank you FIGuy.  I've been surfing the net.  Trying to get lucky.  Being sick with the virus is a real drag.

[desrt]

"PHASE IV TRIALS: Post-marketing studies to delineate additional information including the drug's risks, benefits, and optimal use."

In other words, stuff that's already been approved.