- Immunocompromised patients (other than that related to the use of corticosteroids) including patients known to be human immunodeficiency virus (HIV) positive with an acquired immune deficiency syndrome (AIDS)-defining illness; HIV positive patients with cluster of differentiation (CD) 4 count within institutional normal range and no history of an AIDS-defining illness are eligible; however, some antiviral/antiretroviral medications which have CYP3A4 interactions are prohibited on this study