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Human tonsil samples were provided by the MD Anderson Foundation Biobank (record number B.0000745, ISCIII National Biobank registry) with informed patient consent. All procedures involving human samples were conducted in compliance with the ethical and technical standards of the Spanish National Biobank Network, including anonymization of samples, and were carried out in accordance with the principles of the Declaration of Helsinki.","order":1,"name":"Ethics","label":"Ethics approval and consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":2,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"539"}}