Excluding pulmonary embolism without imaging tests – Can our diagnostic algorithm be optimized? - Nijkeuter, Mathilde; Tick, Lidwine W.; Sohne, Maaike; Kruip, Marieke J. H. A.; Buller, Harry R.; Leebeek, Frank W. G.; Kramer, Mark H. H.; Klok, Frederikus A.; Prins, Martin H.; Huisman, Menno V.; the Christopher Study Investigators; on behalf of (Thrombosis and Haemostasis, 2008)