194 A.2d 167 Smith, Appellant, v. Yohe. Smith, Appellant, v. Gailey. Supreme Court of Pennsylvania.Argued May 27, 1963. October 9, 1963. Negligence — Physicians and surgeons — Standard of duty — Skill and knowledge required — Care and judgment required — Standard of reasonable man — Negligent practice — Proof — Expert testimony — Failure […]