In this episode, Jonathan Chang describes to Jason Robertson interesting cases from his recent teaching in Spain, Poland and Canada.  In the process, a discussion arises regarding the importance of focusing on a 'chief complaint' or 'primary symptom' (主症 zhǔ zhèng) in order to construct a 'symptom-pattern-structure' (證候結構 zhèng hòu jié gòu).  For much more on diagnostic strategy, please see/download Jason and Jonathan's article from The Lantern - Home | The Lantern