Is there any case law in support of the Fifth Amendment protecting voluntary witnesses from cross-examination?

'(W)hen a witness voluntarily testifies, the privilege against self-incrimination is amply respected without need of accepting testimony freed from the antiseptic test of the adversary process. The witness himself, certainly if he is a party, determines the area of disclosure and therefore of inquiry. Such a witness has the choice, after weighing the advantage of the privilege against self-incrimination against the advantage of putting forward his version of the facts and his reliability as a witness, not to testify at all. He cannot reasonably claim that the Fifth Amendment gives him not only this choice but, if he elects to testify, an immunity from cross-examination on the matters he has himself put in dispute. It would make of the Fifth Amendment not only a humane safeguard against judicially coerced self-disclosure but a positive invitation to mutilate the truth a party offers to tell. ' (T)here is hardly justification for letting the defendant affirmatively resort to perjurious testimony in reliance on the Government's disability to challenge his credibility.' (Citation.) The interests of the other party and regard for the function of courts of justice to ascertain the truth become relevant, and prevail in the balance of considerations determining the scope and limits of the privilege against self-incrimination. Petitioner, as a party to the suit, was a voluntary witness. She could not take the stand to testify in her own behalf and also claim the right to be free from cross-examination on matters raised by her own testimony on direct examination.' (Cf. also, People v. Withers, 73 Cal.App.2d 58, 60--61, 165 P.2d 945.)