Have any laboratory abnormality for which withdrawal of a drug or drug regimen might be considered. For the purposes of general guidance, Grade III toxicities would result in exclusion from study with the exception of stable thrombocytopenia or proteinuria or elevated bilirubin resulting from Gilbert's syndrome or indinavir treatment. Grade II SGOT or SGPT might be a reason for study exclusion if not explained by underlying hepatitis or if in a pattern of recent increase over a stable baseline.