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Dr. Jiong Hao TAN reports grants from the National Medical Research Council, during the conduct of the study; Dr. Nivetha Ravikumar, Dr. Joel Yong Hao Tan and Dr. Zhaojin Chen have nothing to disclose. Dr. Milavec reports grants from the Swiss Society of Orthopaedics and Traumatology (Swiss orthopaedics), outside the submitted work.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"All procedures performed in this study involving human participants were in accordance with the ethical standards of the Domain Specific Review Board (Domain D) of the National Healthcare Group by which the study protocol was approved. This complies with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}