what they need now would be also an adviser pretty known in the whole world

who already made some hardcore deasease public or is a rockstar in the health sector.
I think that is something they can achieve through their marketing on health related conferences etc.
If they can convince some more experts for the proejct some of them maybe are willing to join as adviser maybe.
I don't think they necessarily need that at first. they can manage with a few competent people and once the brand is established they can fish around for someone famous.