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Current Version - Under Revision

In earlier releases, there were two attributes named 246100006 |ONSET| and 260908002 |COURSE|. These were retired because they could not be used reproducibly. While 246100006 |ONSET| was intended to specify the rapidity of onset or the temporal pattern of presentation for a given condition, it was easily confused with the attribute 260908002 |COURSE| used to represent the duration of a condition. There was not consistent agreement between observers making this distinction.

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