Article 2 cell viability 2 defined approach human 2 human cell 2 prediction 2 Draize eye test 1 OECD 1 Organisation for Economic Co-operation and Development 1 UN GHS 1 United Nations 1 biological marker 1 borderline range 1 cell assay 1 cell differentiation 1 cinnamaldehyde 1 controlled study 1 cornea opacity 1 corrosion 1 cutoff 1 data analysis 1 decision tree 1 diagnostic test accuracy study 1 direct peptide reactivity assay 1 ester 1 eye disease 1 eye irritation 1 eye irritation test 1 follow up 1 hazard 1