Pretest probability plus D dimer pathways to reduce imaging
PERC use in low risk patients
Decision tools and validation
Wells score original derivation and validation studies
Pretest probability stratification for PE
PERC derivation and validation studies
Very low risk exclusion without testing
YEARS studies
Reduced imaging with adjusted D dimer thresholds
PESI and sPESI validation
Mortality risk prediction and outpatient selection
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