cubicweb-brainomics #4045114 Update random import with new medical data [validation pending]

prioritynormal
typebug
done in0.12.0
load0.200
load left0.000
closed by#4d03906226b0 [importer] Add SurvivalData in importer, closes #4045114
patch[importer] Add SurvivalData in importer, closes #4045114 [applied][importer] Add TherapyEvaluation in importer, related to #4045114 [applied][importer] Create multiple studies and assign one of them to each subject, related to #4045114 [applied][scales] Add admission scores at inclusion, related to #4045114 [applied]