1. Volume 153, Issue 1, Pages 152-160 (January 2018)
Performance of Low-Dose Perfusion Scintigraphy and CT Pulmonary Angiography for Pulmonary Embolism in Pregnancy 
Jean-Ju Sheen, MD, Linda B. Haramati, MD, FCCP, Anna Natenzon, MD, Hong Ma, MD, Pamela Tropper, MD, MPH, Anna S. Bader, MD, Leonard M. Freeman, MD, Peter S. Bernstein, MD, MPH, Renee M. Moadel, MD 
CHEST 
Volume 153, Issue 1, Pages (January 2018)
DOI: /j.chest
Copyright © 2017 American College of Chest Physicians Terms and Conditions

2. Figure 1
Study flowchart. CTPA = CT pulmonary angiography; LDQ = low-dose perfusion; PE = pulmonary embolus.
CHEST  , DOI: ( /j.chest )
Copyright © 2017 American College of Chest Physicians Terms and Conditions

3. Figure 2
Study flowchart of subgroup of patients with asthma. See Figure 1 legend for expansion of abbreviations.
CHEST  , DOI: ( /j.chest )
Copyright © 2017 American College of Chest Physicians Terms and Conditions