translation.en: This is the natural history of heart disease, but it’s really not natural because we found it could get better and better, and much more quickly than people had once thought.
translation.zh: 这是心脏病发展的自然规律， 可是它的确又不是必然的，因为我们发现病情可以变得越来越好， 而且比人们曾以为的要快得多。