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Open-Access Journal
Editorial
Alessandro de Sire, Marco Invernizzi, Alessio Baricich, Lorenzo Lippi, Antonio Ammendolia, Federico Alberto Grassi, Massimiliano Leigheb 
World J Orthop 12(7):456-466. Published online Jul 18, 2021. doi: 10.5312/wjo.v12.i7.456
Review
Federico Roggio, Silvia Ravalli, Grazia Maugeri, Antonino Bianco, Antonio Palma, Michelino Di Rosa, Giuseppe Musumeci 
World J Orthop 12(7):467-484. Published online Jul 18, 2021. doi: 10.5312/wjo.v12.i7.467
Minireviews
Panagiotis Koutsouradis, Olga D Savvidou, Emmanouil D Stamatis 
World J Orthop 12(7):485-494. Published online Jul 18, 2021. doi: 10.5312/wjo.v12.i7.485
Retrospective Study
Observational Study
Mihovil Plečko, Alan Mahnik, Damjan Dimnjaković, Ivan Bojanić 
World J Orthop 12(7):505-514. Published online Jul 18, 2021. doi: 10.5312/wjo.v12.i7.505
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