Does the Virginia Medical Malpractice Act's requirement apply to a medical malpractice claim under the Federal Tort Claims Act?

QUESTION PRESENTED Does the Virginia Medical Malpractice Act’s requirement that a plaintiff possess a written opinion signed by an expert witness that, based upon a reasonable understanding of the facts, the defendant for whom service of process has been requested deviated from the applicable standard of care and the deviation was a : proximate cause of the injuries claimed apply to a medical malpractice claim brought under the Federal Tort Claims Act? i