Guo, Zhenying About RAS mutation-specific immunohistochemistry in formalin-fixed, paraffin-embedded tumor samples-reply. [electronic resource] - Human pathology 02 2017 - 209 p. digital Publication Type: Letter; Comment ISSN: 1532-8392 Standard No.: 10.1016/j.humpath.2016.06.028 doi Subjects--Topical Terms: FormaldehydeHumansImmunohistochemistryMutationNeoplasmsParaffin EmbeddingTissue Fixation