“…The majority of studies were conducted in the USA 5,7,21-24-29 , with one each conducted in Ireland 30 , Latin America 31 , Indonesia 32 and South India. 20 Most of the studies were conducted in paediatric intensive care areas. 7,20,21,[24][25][26][27][29][30][31][32] One was conducted in the cardiac care unit 23 , only one was conducted on a general paediatric ward 5 , with the remaining two conducted in paediatric hospitals 22,28 , thus restricting the external validity of results to hospitalised ward patients.…”