Patient Controlled Analgesia: Principles and Practice Series Edward Welchew ISBN: 978-0-7279-0860-5 Paperback 140 pages August 1995, BMJ Books US $73.95 Add to Cart This price is valid for United States. Change location to view local pricing and availability. This is a Print-on-Demand title. It will be printed specifically to fill your order. Please allow an additional 5-6 days delivery time. The book is not returnable.