Preoperative Acute Normovolaemic Hemodilution (ANH) in combination with Hypotensive Epidural Anaesthesia (HEA) during knee arthroplasty surgery. No effect on transfusion rate. A randomized controlled trial [ISRCTN87597684] - Juelsgaard, P; Møller, M; Larsen, U (BMC Anesthesiol, 2002)