natural history -- keywords

I've found that articles on the natural history of a disease can be a bit tricky to retrieve.  I have no comprehensive strategy for searching for such articles, but have run across a few useful phrases that are 'found' by PubMed.  If anyone has other useful phrases/terms, I would love to receive them!

"natural history" OR "natural histories" OR "natural course" OR "natural courses" OR "natural progression" OR "typical course" OR "typical courses" OR "typical progression" OR "usual course" OR "usual courses" OR "usual progression" OR "expected course" OR "expected courses" OR "expected progression" OR "expected progressions"

"natural history"[mesh] refers to natural history as a field of study in biology, and, thus, is not useful.  "Disease progression"[mesh] is sometimes useful.