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Open-Access Journal
Editorial
Sven Goetstouwers, Dagmar Kempink, Bertram The, Denise Eygendaal, Bart van Oirschot, Christiaan JA van Bergen 
World J Orthop 13(1):1-10. Published online Jan 18, 2022. doi: 10.5312/wjo.v13.i1.1
Review
Retrospective Cohort Study
Artit Laoruengthana, Piti Rattanaprichavej, Parin Samapath, Bhuwad Chinwatanawongwan, Pariphat Chompoonutprapa, Krit Pongpirul 
World J Orthop 13(1):58-69. Published online Jan 18, 2022. doi: 10.5312/wjo.v13.i1.58
Retrospective Study
Clinical Trials Study
Observational Study
Prospective Study
Systematic Reviews
Octavian Andronic, Ladislav Nagy, Marco D Burkhard, Fabio A Casari, Daniel Karczewski, Philipp Kriechling, Andreas Schweizer, Lukas Jud 
World J Orthop 13(1):112-121. Published online Jan 18, 2022. doi: 10.5312/wjo.v13.i1.112