(1) An expe rt witness's evidence in chief comprises:
(a) the expert's report; and
(b) any changes to that report in a notice under subrule 7.18(5); and
(c) any answers to questions under rule 7.27.
(2) An expert witness has the same protection and immunity in relation to the contents of a report disclosed under these Rules or an order as the expert witness could claim if the contents of the report were given by the expert witness orally at a hearing or trial.