Cox Regression.

<p>Cox Regression.</p

Kaplan-Meier Plot PFS.

<p>Kaplan-Meier Plot PFS.</p

Clinical Characteristics of ….

<p>Clinical Characteristics of ….</p

Kaplan-Meier Plot OS.

<p>Kaplan-Meier Plot OS.</p

Limitation of this study - non-English articles.

<p>Note: n/s – not specified; y/n – yes/no.</p>a<p>Provided by title of the article or abstract if available.</p

Initial symptoms and radiology features.

<p>Initial symptoms and radiology features.</p

Systematic literature search.

<p>Procedure of publication retrieval and in- and exclusion of cases is displayed in a PRISMA (preferred reporting items for systematic reviews and meta-analyses) flow chart.</p