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Open-Access Journal
Review
Minireviews
Basic Study
Tosan Okoro, Kar Hao Teoh, Hiro Tanaka 
World J Orthop 12(8):548-554. Published online Aug 18, 2021. doi: 10.5312/wjo.v12.i8.548
Observational Study
Patryck Lloyd-Donald, Wen-Shen Lee, Guo-Ming Liu, Rinaldo Bellomo, Larry McNicol, Laurence Weinberg 
World J Orthop 12(8):555-564. Published online Aug 18, 2021. doi: 10.5312/wjo.v12.i8.555
Prospective Study
Rodrigo Calil Teles Abdo, Riccardo Gomes Gobbi, Chilan Bou Ghosson Leite, Sandra Gofinet Pasoto, Elaine Pires Leon, Ana Lucia Lei Munhoz Lima, Eloisa Bonfa, José Ricardo Pécora, Marco Kawamura Demange 
World J Orthop 12(8):565-574. Published online Aug 18, 2021. doi: 10.5312/wjo.v12.i8.565
Systematic Reviews
Giulia Masci, Osvaldo Palmacci, Raffaele Vitiello, Nadia Bonfiglio, Maria Beatrice Bocchi, Valerio Cipolloni, Giulio Maccauro, Enrico Pola 
World J Orthop 12(8):575-583. Published online Aug 18, 2021. doi: 10.5312/wjo.v12.i8.575
Michał Latalski, Marek Fatyga, Ireneusz Sowa, Magdalena Wojciak, Grzegorz Starobrat, Anna Danielewicz 
World J Orthop 12(8):584-603. Published online Aug 18, 2021. doi: 10.5312/wjo.v12.i8.584
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