Fei et al. [6] further developed a clinical score model, which indicated that age per 10-year increase, recent injection drug use, total bilirubin >0.6 mg/dl, serum albumin <3 g/dl, and alveolar-arterial oxygen gradient >or = 50 mm Hg were used to predict mortality from HIV/AIDS-associated PCP at illness presentation; this prediction score model was developed in United States but not validated in Chinese HIV/AID population with PCP, who had unique clinical features with Chinese characteristics. This evidence concerns the gene ALB and AIDS.