Sentence:  Being a discussion between a Swede and an Australian of the medical <WSD>persuasion</WSD>, conversation turned to Pehr Edman who, as a Swedish expatriate, spent many years in Australia heading up the School of Medical Research at St Vincent's Hospital. 
Meaning of the word marked with <WSD> tags:  Another personal, animal or inanimate trait that is not (very) liable to be changed by persuasion, such as sex, gender, ethnicity, origin, profession or nature.