1. Gallbladder cancer: Clinical and pathological approach
   Keita Kai, 2014, World Journal of Clinical Cases CrossRef
2. Cytokeratin 17 Expression is Associated With Poor Prognosis in Gallbladder Adenocarcinoma
   Kyungeun Kim et al, 2017, Applied Immunohistochemistry & Molecular Morphology CrossRef
3. Inverse correlation between CD8+inflammatory cells and E-cadherin expression in gallbladder cancer: Tissue microarray and imaging analysis
   Keita Kai et al, 2017, World Journal of Clinical Cases CrossRef
4. Immunohistochemical analysis of the aggregation of CD1a-positive dendritic cells in resected specimens and its association with surgical outcomes for patients with gallbladder cancer
   Keita Kai et al, 2021, Translational Oncology CrossRef