rMSIproc: an R package for mass spectrometry imaging data processing. - Pere Ràfols; Bram Heijs; Esteban del Castillo; Oscar Yanes; Liam A. McDonnell; Jesús Brezmes; Iara Pérez-Taboada; Mario Vallejo; María García-Altares; Xavier Correig (Bioinform., 2020)