Comprehensive blood metabolomics profiling of Parkinson’s disease reveals coordinated alterations in xanthine metabolism oleh Elisa Gómez de Lope, Rebecca Ting Jiin Loo, Armin Rauschenberger, Muhammad Ali, Lukas Pavelka, Tainá M. Marques, Clarissa P. C. Gomes, Rejko Krüger, Enrico Glaab, On behalf of the NCER-PD Consortium