5

---------------------------------------------------------- Esercizio 3 - accorpa tre ricerche di vocaboli in free- text con gli operatori boleani -----------------------------------------------------------

#4 #1 OR #2 OR #3 18310

#3 Search hypercholesterolemic[tiab] 4219

#2 Search hypercholesterolaemia[tiab] 3088

#1 Search hypercholesterolemia[tiab] 12816

#4 #1 AND #2 AND #3 4

#3 Search hypercholesterolemic[tiab] 4219

#2 Search hypercholesterolaemia[tiab] 3088

#1 Search hypercholesterolemia[tiab] 12816

#4 #1 NOT #2 NOT #3 2519

#3 Search hypercholesterolemic[tiab] 4219

#2 Search hypercholesterolaemia[tiab] 2997

#1 Search hypercholesterolemia[tiab] 12272