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Unfortunately, the original statement did not include the authors\ufffd\ufffd\ufffd nonfinancial conflicts of interest, including grants and personal fees. The corrected conflict of interest statement is shown below:","order":6,"name":"change_details","label":"Change Details","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"T. \ufffd\ufffd\ufffd","order":7,"name":"change_details","label":"Change Details","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical guidelines"}},{"value":"A.\u00a0Deregibus, L.\u00a0Tallone, G.\u00a0Rossini, S.\u00a0Parrini, M.\u00a0Piancino and T.\u00a0Castroflorio declare that they have no competing interests.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"The research protocol was approved by the local ethics board (No. 3732015, CIR Dental School, Turin University). 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