359 A.2d 247 J. LAURENCE MILLISON v. SECRETARY OF HEALTH AND MENTAL HYGIENE. No. 1189, September Term, 1975.Court of Special Appeals of Maryland. Decided June 29, 1976. EVIDENCE — WITNESSES — Expert — Applicable Test — Qualifications Of Expert Witness Within Sound Discretion Of Trial Court — Opinion Must Be Based Upon Facts Sufficient To […]