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The full project protocol was submitted to the Ethics Committee in April 2016 and approved in May 2016.The study used data routinely collected in Portuguese public hospitals. The DRG database was requested to the ACSS \u2013 MCD\u2009=\u200924 (HIV\/AIDS infection) only, for the years 2009\u20132014 \u2013 and was sent to the authors completely anonymized. Therefore, the authors cannot identify any subject on that database. The Central Administration of the Health System (ACSS) is the legal owner of the DRG database in Portugal.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Publisher\u2019s Note"}}],"article-number":"303"}}