The Free Online Palliative Care Dictionary
Published by Roberto Wenk. Reviewed by Alison Ramsey. Last updated date: January 16, 2019.
National Cancer Institute. Internet. Accessed on October 28, 2011.
Occult primary tumor. IAHPC Pallipedia. https://pallipedia.org/occult-primary-tumor/apple-touch-icon-144x144.png. Accessed
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