Assertion: viagra's effect | /r/RelatedTo | pde type 5 inhibitors
Facets:
value: to other factors
type: CAUSE
value: directly
type: MANNER
Source sentences:
text: Although not clear whether such effects are directly related to PDE type 5 inhibitors or to other factors (e.g., patient’s underlying medical condition, concomitant use of other ototoxic drugs), a strong temporal relationship has been observed.1 203 214 216 217