FSTL3 and pulmonary arterial hypertension: Yokokawa et al. further focused on inflammation-related proteins using the Olink platform and found that elevated plasma levels of FSTL3 and SPON1 were independently associated with death or lung transplantation at the time of PAH diagnosis with incremental prognostic value on top of the 2015 ESC/ERS, the REVEAL 2.0 risk scores and the refined 4-strata risk assessment [96].