Table 1. Search Syntax.

(The search was performed on 28-02-2013)

PubMed (442 results)

(angiotensin OR noradrenaline OR vasopressin OR vasoconstrictor) AND (“blood-flow” OR “blood flow”) AND (liver OR hepatic)

Limit: title/abstract

EMBASE (500 results)

(angiotensin:ab,ti OR noradrenaline:ab,ti OR vasopressin:ab,ti OR vasoconstrictor:ab,ti) AND (‘blood-flow’:ab,ti OR ‘blood flow’:ab,ti) AND (liver:ab,ti OR hepatic:ab,ti)

Cochrane (35 results)

(angiotensin OR noradrenaline OR vasopressin OR vasoconstrictor) AND (“blood-flow” OR “blood flow”) AND (liver OR hepatic)

In Cochrane Central Register of Controlled Trials (Clinical Trials)

In this table, the search syntax used in PubMed, EMBASE and Cochrane databases is displayed. The number of results include double titles. In total, 524 original titles were identified.