Adrian Harrison has always used a systematic approach to diagnosis and problem solving in his career as a Respiratory (or Chest) Physician. After Medical School and two years of post graduate training in Adelaide (M.B.B.S, 1971) Adrian moved to Concord Hospital in Sydney for a further two years before completing his Respiratory training (F.R.A.C.P. 1979) as a Clinical and Research Fellow at hospitals associated with the University of Southern California at Irvine. Adrian moved to Green Lane and Auckland City Hospitals in 1979, and he still works there as a part time Respiratory Consultant.