1. An entirely new intervention may be implemented and added to the old intervention. The notation would be A-B-BC. 2. An entirely new intervention may be implemented, in place of the old...

1. An entirely new intervention may be implemented and added to the old intervention. The notation would be A-B-BC.

2. An entirely new intervention may be implemented, in place of the old intervention, which is now terminated. The notation would be A-B-C.