LAUSR

J.P. acknowledges an FPU fellowship from the Spanish Ministry of Science, Innovation and Universities. L.M.L.‐M. acknowledges funding from the European Research Council (ERC AdG 787510, 4DbioSERS) and the Maria de Maeztu Units of Excellence Program from the Spanish State Research Agency (Grant No. MDM‐2017‐0720). C.G.‐A. acknowledges a Juan de la Cierva Fellowship from the Spanish Ministry of Science, Innovation and Universities (FJCI‐2016‐28887). The authors thank Dr. J. Calvo and Dr. D. Otaegui at CIC biomaGUNE for support with LC/ESI‐HRMS measurements. The work of A.C. was supported by the Basque Department of Industry, Tourism and Trade (Elkartek), and the department of education (IKERTALDE IT1106‐16, also participated by A. Gomez‐Munoz), the BBVA foundation, the MINECO (SAF2016‐79381‐R (FEDER/EU); Severo Ochoa Excellence Program SEV‐2016‐0644‐18‐1; Excellence Networks SAF2016‐81975‐REDT), European Training Networks Project (H2020‐MSCA‐ITN‐308 2016 721532), the AECC (IDEAS175CARR, GCTRA18006CARR), La Caixa Foundation (HR17‐00094), and the European Research Council (starting Grant 336343, PoC 754627). CIBERONC was co‐funded with FEDER funds and funded by ISCIII. A.M. acknowledges funding from the European Research Council (Consolidator Grant 819242) and the Spanish Ministry of Science, Innovation and Universities for the excellence program SEV‐2015‐0496.J.P. acknowledges an FPU fellowship from the Spanish Ministry of Science, Innovation and Universities. L.M.L.‐M. acknowledges funding from the European Research Council (ERC AdG 787510, 4DbioSERS) and the Maria de Maeztu Units of Excellence Program from the Spanish State Research Agency (Grant No. MDM‐2017‐0720). C.G.‐A. acknowledges a Juan de la Cierva Fellowship from the Spanish Ministry of Science, Innovation and Universities (FJCI‐2016‐28887). The authors thank Dr. J. Calvo and Dr. D. Otaegui at CIC biomaGUNE for support with LC/ESI‐HRMS measurements. The work of A.C. was supported by the Basque Department of Industry, Tourism and Trade (Elkartek), and the department of education (IKERTALDE IT1106‐16, also participated by A. Gomez‐Munoz), the BBVA foundation, the MINECO (SAF2016‐79381‐R (FEDER/EU); Severo Ochoa Excellence Program SEV‐2016‐0644‐18‐1; Excellence Networks SAF2016‐81975‐REDT), European Training Networks Project (H2020‐MSCA‐ITN‐308 2016 721532), the AECC (IDEAS175CARR, GCTRA18006CARR), La Caixa Foundation (HR17‐00094), and the European Research Council (starting Grant 336343, PoC 754627). CIBERONC was co‐funded with FEDER funds and funded by ISCIII. A.M. acknowledges funding from the European Research Council (Consolidator Grant 819242) and the Spanish Ministry of Science, Innovation and Universities for the excellence program SEV‐2015‐0496.