Notes taken during data collection were checked against audio recorded and record review information.
All data collection forms were checked by field supervisors for completeness and reliability.
Consistency of the network induced changes was checked by an additional data collection three years after.
The interviews were transcribed and translated in the same document, and the accuracy of the translations was checked by a research assistant not involved with data collection.
Decolonization was checked by a second swab collection seven days after the beginning of the intervention.
The quality of the alignment was checked by taking a CCD image of the carbon film under the same dosage as was used for data collection.
Survival of all study subjects was checked by the study team at the age of 23 months, or following the termination of the study data collection in December 2004.
When the data collection was completed, all data were checked by a second investigator.
All data were verified by a trained data collection nurse and diagnoses were checked by two doctors, one of whom was an intensive care physician.
Before data collection, the Pedar insoles were checked by the Trublu calibration device in order to verify the performance of all sensors.
