1 disease that is common. 1 disease that is very rare. 28 diseases without any prevalence information. Causes of Barrel chest without any prevalence information The following causes of Barrel chest are ones for which we do not have any prevalence information.
Definition of flashback for English Language Learners. : a part of a story or movie that describes or shows something that happened in the past.
Definition of narration for English Language Learners. : 1  the act or process of telling a story or describing what happens. : 2  words that are heard as part of a movie, television show, etc., and that describe what is being seen.