Ryan asked one of her colleagues, a research specialist at the Texas Medical Center Library in Houston, to search the medical literature.

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Their team manager Dave Ryan asked race director Charlie Whiting whether he felt that Hamilton had done enough in handing back the position to satisfy the stewards.

BBC: McLaren discover date for appeal

There have been questions asked about why Ryan was allowed to decide what story to tell the stewards without referring to team principal Martin Whitmarsh or his predecessor, McLaren chairman, Ron Dennis.

BBC: Coulthard on Hamilton row