Specific-cytokine associations with outcomes in knee osteoarthritis subgroups: breaking down disease heterogeneity with phenotyping.

"Declarations Ethics approval and consent to participateThe project was evaluated and approved by the ethical committee of our centre (CEIm Parc Taulí) with approval number 2015/539. This study involves human participants. The study is being conducted in compliance with the protocol, Good Clinical Practice (GCP), the Declaration of Helsinki, and applicable ethical and legal regulatory requirements. All participants have received oral and written information and provided written informed consent authorizing the collection of samples and data for their use in the context of knee osteoarthritis studies. Consent for publicationThe data used in the current study are available from the corresponding author upon reasonable request. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This research leading to these results has received support from the Societat Catalana de Reumatologia official grants 2015-2016-2017-2018-2019 and the grant of the original research project from Sociedad Española de Reumatología 2017. This research was also supported by the CERCA Programme/Generalitat de Catalunya. Dr. Joan Calvet was awarded an intensification grant from I3PT in 2020 and 2022 and Sociedad Española de Reumatología in 2021 and 2023."