different designs
different determinants
different development stages
different developmental processes
different developmental stages
different developmental trajectories
different devices
different diagnoses
different diameters
different diamines
different dietary treatments
different diets
different diisocyanates
different dilution rates
different dimensions

different directions
different disciplines
different discourses
different disease conditions
different disease entities
different disease phenotypes
different diseases
different disorders
different distances
different distribution patterns
different distributions
different divisions
different domains
different donors
different dosages
different doses

different drivers
different drugs
different durations
different dyes
different dynamics
different echo times
different ecological conditions
different ecological niches
different ecologies
different ecosystems
different effect
different effects
different efficacies
different electrolytes
different elements
different elevations

different embryonic stages
different emphases
different empirical models
different endpoints
different energies
different entities
different environmental
different environmental conditions
different environmental factors
different environments
different enzymes
different epitopes
different epochs
different estimates
different estimators
different ethnic backgrounds

different ethnic groups
different ethnic populations
different ethnicities
different etiologies
different events
different evolutionary histories
different examples
different excitation wavelengths
different expectations
different experiences
different experimental approaches