MBL2 and bronchiolitis obliterans syndrome: Immunohistochemistry for MBL was performed on sections of lung allograft tissue from patients at the time of lung allograft implantation paralleling cold ischemia, (n = 6) (Figure 1), explanted lung tissue from patients retransplanted for bronchiolitis obliterans syndrome (BOS, n = 8) (Figure 2) and non-transplant patients with diffuse alveolar damage (DAD, n = 6) (Figure 3), in accordance with IRB protocols.