ALK and Histiocytosis: Chang Chang Chang ALK-positive histiocytosis: an expanded clinicopathologic spectrum and frequent presence of KIF5B-ALK fusion ALK-positive histiocytosis: an expanded clinicopathologic spectrum and frequent presence of KIF5B-ALK fusion Mod Pathol Mod Pathol 2019 2019 32 32 5 5 598 598 608 608 10.1038/s41379-018-0168-6 10.1038/s41379-018-0168-6 supplied-pmid 30573850?