Introduction The omission of the immunohistochemical proliferation marker Ki-67 labelling index (henceforth. simply Ki-67) from the 2015 WHO classification system of pulmonary neuroendocrine tumours (Lung-NETs) as a prognostic and grading criterion remains controversial. This systematic review along with meta-analysis will be conducted to assess the prognostic/grading utility of Ki-67... https://allfixelectricales.shop/product-category/inlet-valve-seal/