C D Figure 1. Receiver operative curves depicting the relation between reference standard BAL culture colony count ≥ 104 cfu/ ml and (A) CPIS (AUC 0.81± 0.06, p = 0.001), (B) ETA ( AUC 0.87± 0.06,p = 0.00), (C) BBS (AUC 0.89± 0.06, p= 0.01), (D) blind BAL ( AUC 0.89± 0.05, p= 0.00).