In citing Arleen M. Kaptur's articles from the Today's Caregiver, Emily is most likely relying on a secondary source.
A secondary source of information is:
Arleen Kaptur mentions statistics about how 50% of Amyotrophic Lateral Sclerosis (ALS) patients die in 18 months of diagnosis. Arleen could not have gotten this information by themselves because it is usually professional organizations or the government that compiles such medical data.
In conclusion, Arleen's article is based on primary data which means that it is secondary data should Emily use it.
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