I want to know the answer to the following question:
The Kitab al-shifa and The Canon of Medicine are considered what?
All the background I'm provided with is that "His two most notable works in medicine are the Kitāb al-shifāʾ ("Book of Healing") and The Canon of Medicine, both of which were used as standard medicinal texts in both the Muslim world and in Europe well into the 17th century.". Is that enough to answer the question?