A. Long-term > 5 years post-lung transplant (n = 33) patients, irregardless of BOS stage, had significantly lower levels of MBL in the blood compared to lung transplant patients < 5 years with BOS Op-3 (n = 10), 1738 ± 250 ng/ml vs 3198 ± 370 ng/ml, p = 0.027, and similar levels to lung transplant patients < 5 years with BOS 0 (n = 12), 1738 ± 250 ng/ml vs 1808 ± 345 ng/ml. The gene discussed is MBL2; the disease is Buschke-Ollendorff syndrome.