Assertion: thalassemia's blood cell | /r/MadeOf | a lot of iron
Facets:
Source sentences:
text: Red blood cells contain a lot of iron, and over time, the iron from all of the transfusions can build up in the body.
text: But red blood cells contain a lot of iron, so regular transfusions can cause the mineral to build up in the body, which can lead to organ damage.