Special care is needed with regard to the exclusion criteria.

Exclusion criteria could be used by the firm, as it saves time and money.

The exclusion criteria for controls were the same as for cases.

The same exclusion criteria applies to non-Slovak schools in the teaching of geography and history.

Exclusion criteria were based on general categories of relevance, setting, population, outcomes, interventions, design, quality and study period.

Second, our exclusion criteria eliminated patients requiring only brief periods of ventilation.

Exclusion criteria are the standards used to determine whether a person may or may not be allowed to participate in a clinical trial.

The exclusion criteria for the selection of controls were constipation or other gastrointestinal problems.

The other major exclusion criteria were Crohn's disease, pregnancy, or concomitant serious medical conditions.

After review of the retrieved papers, a secondary exclusion criterion, inappropriate statistical tests used, was applied.