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This study involved no human participants.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"We dedicate this manuscript to our colleague and friend Sandra Sosa-Rub\u00ed, Ph.D., who inspired us to analyse equity during her fruitful lifetime and passed away in March 2021.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Memorial dedication"}},{"value":"Not applicable.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"10"}}