litter removal
litter samples
litter size
litter types
littermate control mice
littermate controls
littermate mice
littermates
little
little account
little activity
little agreement

little amount
little analysis
little association
little attempt
little attention
little awareness
little basis
little benefit
little bit
little capacity
little chance
little change
little choice

little concern
little confidence
little consensus
little consideration
little consistency
little contribution
little control
little correlation
little correspondence
little critical attention
little cytotoxicity
little damage
little data

little data available
little decline
little degradation
little difference
little different
little differentiation
little direct evidence
little discussion
little doubt
little effect
little effort
little emphasis
little empirical analysis

little empirical evidence
little empirical research
little empirical support
little empirical work
little energy
little evaluation