Cuthbertson , B H , Francis , J , Campbell , M K , MacIntyre , L , Seppelt , I , Grimshaw , J & SuDDICU study groups 2010 , ' A study of the perceived risks, benefits and barriers to the use of SDD in adult critical care units (the SuDDICU study) ' Trials , vol 11 , pp. 117 . DOI: 10.1186/1745-6215-11-117