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Opinion Review
Review
Minireviews
Retrospective Cohort Study
Retrospective Study
Meta-Analysis
Sujit Kumar Tripathy, Siddharth Satyakam Pradhan, Paulson Varghese, Prabhudev Prasad Purudappa, Sandeep Velagada, Tarun Goyal, Bijnya Birajita Panda, Jagadeesh Vanyambadi 
World J Clin Cases 9(2):357-371. Published online Jan 16, 2021. doi: 10.12998/wjcc.v9.i2.357
Case Report
Yu Liang, Hong-Xiang Gao, Rui-Cheng Tian, Jing Wang, Yu-Hua Shan, Lei Zhang, Chen-Jie Xie, Jing-Jing Li, Min Xu, Song Gu 
World J Clin Cases 9(2):429-435. Published online Jan 16, 2021. doi: 10.12998/wjcc.v9.i2.429
Masahiro Yura, Kikuo Yo, Asuka Hara, Keita Hayashi, Yuki Tajima, Yasushi Kaneko, Hiroto Fujisaki, Akira Hirata, Kiminori Takano, Kumiko Hongo, Kimiyasu Yoneyama, Motohito Nakagawa 
World J Clin Cases 9(2):509-515. Published online Jan 16, 2021. doi: 10.12998/wjcc.v9.i2.509
Heng Juei Hsu, Chi Chen Huang, Ming Tsung Chuang, Chih Hao Tien, Jung Shun Lee, Po-Hsuan Lee 
World J Clin Cases 9(2):516-520. Published online Jan 16, 2021. doi: 10.12998/wjcc.v9.i2.516