Expert Report by Christopher J. Portier, March 1, 2021, filed with the Superior Court for the District of Columbia (Civil Division) on March 3, 2021 in the case of Murray (et al.) v. Motorola (et al.) (2001 CA 008479 B). “In my opinion, RF exposure probably causes gliomas and neuromas and, given the human and experimental evidence, I assert that, to a reasonable degree of scientific certainty, the probability that RF exposure causes gliomas and neuromas is high.”