What is the test for a medical malpractice claim against a hospital for failing to provide adequate care for a patient?

In Molien, "the risk of harm to plaintiff was reasonably foreseeable to defendants.... [p] ... [T]he alleged tortious conduct of defendant was directed to [her] as well as to [her husband]. Because the risk of harm to [her] was reasonably foreseeable ... defendants owed plaintiff a duty to exercise due care in [attending to] the physical condition of [her husband]." (Molien v. Kaiser Foundation Hospitals, supra, 27 Cal.3d 916, 923, 167 Cal.Rptr. 831, 616 P.2d 813.)