The Whitehead double sliceness conjecture

Let $K$ be a knot in $S^3$, and let its Whitehead double be the knot obtained by applying the Whitehead double operation to $K$. Whitehead double sliceness conjecture. The Whitehead double of $K$ is slice if and only if $K$ is slice. This is presented as an open conjecture and is an orientable analogue of the paper's result that twisted Whitehead doubling does not preserve non-orientable sliceness.