Observational Study Of A Protease Inhibitor (PI) Containing Regimen In Subjects With PI Mutations Selected During Prior Treatment With GW433908 (Fosamprenavir)

Inclusion Criteria

• •Prior participation in study APV30005 AND one of the following studies: APV30001, APV30002, AZL30006, APV30003.
• •Must be failing virologically (\>1000 copies at two consecutive time-points) and have a screening genotype with evidence of at least one new APV-associated protease mutation: V32I (+/- I47V), I50V, I54L/M, I84V acquired since commencing treatment with GW433908.