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Open-Access Journal
Opinion Review
Steven B Karch, Vittorio Fineschi, Pietro Francia, Matteo Scopetti, Martina Padovano, Federico Manetti, Alessandro Santurro, Paola Frati, Massimo Volpe 
World J Stem Cells 13(5):331-341. Published online May 26, 2021. doi: 10.4252/wjsc.v13.i5.331
Review
Jing-Yao Yin, Xing-Hong Luo, Wei-Qing Feng, Sheng-Hong Miao, Ting-Ting Ning, Qian Lei, Tao Jiang, Dan-Dan Ma 
World J Stem Cells 13(5):342-365. Published online May 26, 2021. doi: 10.4252/wjsc.v13.i5.342
Xi-Min Hu, Qi Zhang, Rui-Xin Zhou, Yan-Lin Wu, Zhi-Xin Li, Dan-Yi Zhang, Yi-Chao Yang, Rong-Hua Yang, Yong-Jun Hu, Kun Xiong 
World J Stem Cells 13(5):386-415. Published online May 26, 2021. doi: 10.4252/wjsc.v13.i5.386
Minireviews
Basic Study
Vladimir P Baklaushev, Oleg V Durov, Vladimir A Kalsin, Eugene V Gulaev, Sergey V Kim, Ilya L Gubskiy, Veronika A Revkova, Ekaterina M Samoilova, Pavel A Melnikov, Dzhina D Karal-Ogly, Sergey V Orlov, Alexander V Troitskiy, Vladimir P Chekhonin, Alexander V Averyanov, Jan-Eric Ahlfors 
World J Stem Cells 13(5):452-469. Published online May 26, 2021. doi: 10.4252/wjsc.v13.i5.452
Retrospective Study
Serdar Kabatas, Erdinç Civelek, Eyüp Can Savrunlu, Necati Kaplan, Osman Boyalı, Furkan Diren, Halil Can, Ali Genç, Tunç Akkoç, Erdal Karaöz 
World J Stem Cells 13(5):470-484. Published online May 26, 2021. doi: 10.4252/wjsc.v13.i5.470