You can refine your search by combining search terms using logical operators.
| ENTER AS | EFFECT |
|---|---|
|
heart failure |
documents containing either (or both) of the words |
|
+heart +failure |
documents containing both the words |
|
liver heart +failure |
documents containing liver and/or heart which must also contain failure |
|
"heart failure" |
documents containing both words as a phrase |
|
cat -dog |
documents containing the first word but not the second |
|
dig* |
documents containing words starting with 'dig' (must have at least three characters before the *) |
|
warfari? |
documents containing words starting with 'warfari' with exactly one extra character |
| ENTER AS | EFFECT |
|---|---|
|
warfarin alcohol |
interactions between warfarin and alcohol |
|
alcohol warfarin antihistamines |
interactions between all pairs of warfarin, alcohol and antihistamines |
|
+warfarin +alcohol |
interactions between warfarin and alcohol |
|
+alcohol warfarin antihistamines |
interactions between warfarin and alcohol or antihistamines and alcohol |
|
"ace inhibitors" |
interactions of ace inhibitors |
|
warfarin -alcohol |
interactions of warfarin not involving alcohol |