Useful patient assessment tools UpToDate Toxbase BNF EMED Handbook Useful websites Irish Association for Emergency Medicine Calculators San Francisco syncope rule Well's criteria for pulmonary embolism CHADS2VASc stroke risk HAS-BLED bleeding risk PERC Rule for pulmonary embolism HEART score Well's Criteria for DVT Well's Criteria for pulmonary embolism CURB-65 score Other calculators