Remove all grammatical errors from this text: However, for the old-aged with low or no income, they may face difficulties and restrictions in seeking appropriate medical treatment due to financial problems.
The,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
The author of the article is the author of the article.
The author is the author of the article.
The author is the person who wrote the article.
The author is the person who wrote the article.
The author is the person who wrote the article.
The author is the person who wrote the article.
The author is the person who wrote the article.
The author is the person who wrote the article.
The author is the person who wrote the article.