Table 1.

PICOS criteria for inclusion and exclusion of studies

Parameter	Inclusion Criteria	Exclusion Criteria
Population	Humans	Animals, cell cultures
Intervention	Biofortified staple crops with micronutrients	Biofortified nonstaple crops, improved quality protein maize
Comparator	Different biofortified crops or standard “control” crop	None
Outcomes	Acceptance or adoption of biofortified crops	Efficacy or effectiveness without acceptance or adoption
Study design	Cross-sectional surveys, randomized controlled efficacy studies, or effectiveness studies	None