provider in the course of treatment. In cases involving successive tortfeasors whose separate causal contributions to the plaintiff’s harm can be measured, the doctrine of joint and several liability applies only to the enhanced portion of the injury. See Keeton et al. § 52, at 352 (discussing distinction between original tortfeasor’s liability, which encompasses entire injury, and treating physician’s liability, which extends only to negligent treatment); Restatement (Second) of Torts § 433A cmt. c. 17. Even though the original tortfeasor may be held hable for both the original and the enhanced injury, the imposition of entire liability is only temporary. The original tortfeasor, whose duty is of a different character and who is not in pari delicto with a successive 35, 42 (1985) (<HOLDING>). Thus liability for the enhanced injury may be
recognizing the right under federal maritime law to contribution or indemnity from another tortfeasor holding that contribution will lie where no statute precludes recovery from the joint tortfeasor against whom contribution is sought holding original tortfeasor had no right to indemnification because it was not an innocent party recognizing a right to contribution holding original tortfeasor had no right to indemnification because claim properly was for contribution