“…Macroscopic lung pathology was expressed as the lung index of macroscopic pathology (LIMP), which was calculated by dividing the area of the lung showing pathological changes by the total area of the whole lung 39, 41. In addition, the gross pathological changes in the lungs were also assigned four different scores according to the severity of the inflammation as previously described 38, 40, 42: I, normal lungs; II, swollen lungs, hyperemia, and small atelectasis (<10 mm 2 ); III, pleural adhesions and atelectasis (<40 mm 2 ); and IV, abscesses, large atelectasis, and hemorrhages. The evaluation was conducted in a double‐blind way to avoid bias.…”