Funding for this research was provided by:
Fundacion Alfonso Martin Escudero and the Medical Research Council (MR/K501256/1, MR/N013468/1)
Received: 17 October 2020
Accepted: 13 August 2021
First Online: 7 September 2021
: Ethics approval by an ethics committee was not necessary according to national regulations; Data from mandatory notifiable disease in REC application were handled according to Spanish Organic Law 3/2018 on Data protection and guarantee of Digital Rights, and Law 33/2011 on General Public Health. Patient information was anonymized and deidentified before handed over for analysis and therefore no informed consent was required. Patients were not directly involved in this study; only data coming from notifiable disease surveillance systems were used which did not imply any additional approval requirements. Data was handled anonymously by researchers from the Centre of epidemiological studies on sexually transmitted infections and AIDS of Catalonia (CEEISCAT) (Department of Health, Generalitat of Catalonia, Spain), which has the mandate of collect, analyse and disseminate STI/HIV surveillance data in Catalonia, as part of their routine functions.
: Not applicable.
: The authors declare that they have no competing interests.