We used the standard search strategy of the Cochrane Neonatal
ReviewGroup as outlined in TheCochrane Library (2007, Issue 2).
This included searches of the Oxford Database of Perinatal Trials,
the Cochrane Central Register of Controlled Trials (CENTRAL,
The Cochrane Library, 2007, Issue 2), MEDLINE (Silver Platter -
1966 to June, 2007: Infant, Newborn (explode) (MeSH heading)
and Asphyxia (explode) (MeSH heading) or Hypoxic Ischaemic
Encephalopathy and Hypothermia (explode) (MeSH heading)),
previous reviews including cross-references, abstracts, conferences,
symposia proceedings, expert informants and journal handsearching.
We did not apply any language restrictions.
We updated this search in May 2012.