RT Journal Article SR Electronic T1 Use of pulmonary embolism rule-out criteria (PERC) in the emergency department JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP s1 OP s1 DO 10.7861/clinmedicine.15-3-s1 VO 15 IS Suppl 3 A1 Richard Siau A1 Steven Young A1 Melissa Blyth A1 Kirsty Dickson-Jardine YR 2015 UL http://www.rcpjournals.org/content/15/Suppl_3/s1.abstract