Adjoint groups over Qp(X)Qp(X) and R-equivalence

Let F be the function field of a smooth, geometrically integral curve over a p  -adic field with p≠2p≠2. In this paper we show that if G is an absolutely simple adjoint algebraic group over F   of type An⁎2, CnCn or DnDn (D4D4 non-trialitarian) such that the associated hermitian form has even rank, trivial discriminant (if G   is of type An⁎2 or DnDn) and trivial Clifford invariant (if G   is of type DnDn) then the group of rational equivalence classes, G(F)/RG(F)/R is trivial.