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Open-Access Journal
Editorial
Minireviews
Rodrigo Nascimento Pinheiro, Samantha Mucci, Renato Morato Zanatto, Olavo Magalhães Picanço Junior, Alexandre Ferreira Oliveira, Gaspar de Jesus Lopes Filho 
World J Clin Cases 9(17):4123-4132. Published online Jun 16, 2021. doi: 10.12998/wjcc.v9.i17.4123
Retrospective Study
Observational Study
Saria Dbar, Olga Akhmadullina, Elena Sabelnikova, Nikolai Belostotskiy, Asfold Parfenov, Svetlana Bykova, Sergey Bakharev, Elena Baulo, Alexandra Babanova, Lilia Indeykina, Tatyana Kuzmina, Tatiana Kosacheva, Aleksey Spasenov, Alina Makarova 
World J Clin Cases 9(17):4178-4187. Published online Jun 16, 2021. doi: 10.12998/wjcc.v9.i17.4178
Systematic Reviews
Meta-Analysis
Case Report
Meng Zhang, Ling Jin, Yan-Long Duan, Jing Yang, Shuang Huang, Mei Jin, Guang-Hua Zhu, Chao Gao, Yi Liu, Nan Zhang, Chun-Ju Zhou, Zi-Fen Gao, Qin-Long Zheng, Dong Chen, Yong-Hong Zhang 
World J Clin Cases 9(17):4268-4278. Published online Jun 16, 2021. doi: 10.12998/wjcc.v9.i17.4268
Koichi Kimura, Eisuke Adachi, Ayako Toyohara, Sachie Omori, Kaoru Ezaki, Ryo Ihara, Takahiro Higashi, Kippei Ohgaki, Shuhei Ito, Shin-ichiro Maehara, Toshihiko Nakamura, Fumiyoshi Fushimi, Yoshihiko Maehara 
World J Clin Cases 9(17):4453-4459. Published online Jun 16, 2021. doi: 10.12998/wjcc.v9.i17.4453