With the exception of one study [76], increased BALF IL‐8 levels were found in BOS patients compared to stable LTR [13, 17, 18, 21, 24, 26, 27, 30, 33], or compared to stable LTR and healthy controls, and stable LTR compared to healthy controls [15]. Here, CXCL8 is linked to Buschke-Ollendorff syndrome.