1. 1. Rodgers GM, Bithell TC. The diagnostic approach to the bleeding disorders. In: Lee GR, Foerster J, Lukens J, Paraskevas F, Greer JP, Rodgers GM, Eds. Wintrobe’s Clinical Hematology, Lippincott Williams & Wilkins, 1999: 1557-1578.
2. 2. Seligsohn U, Coller BS. Classification, clinical manifestations and evaluation of disorders of hemostasis. In: Beutler E, Lichtman MA, Coller BS, Kipps TJ, Seligsohn U, Eds. William’s Hematology, McGraw Hill, 2001: 1471-1478.
3. 3. Roizen MF, Foss JF, Ficsher SP. Preoperative evaluation. In: Miller RD Eds. Anesthesia, Churchill Livingstone, 2000: 824-883.
4. 4. Finegan BA, Rashiq S, McAlister FA, O'Connor P. Selective ordering of preoperative investigations by anesthesiologists reduces the number and cost of tests. Can J Anaesth 2005; 52: 575-580.
5. 5. Imasogie N, Wong DT, Luk K, Chung F. Elimination of routine testing in patients undergoing cataract surgery allows substantial saving in laboratory costs. A brief report. Can J Anaesth 2003; 50: 246-248.