TRANSFUSION1993—Vol. 33, No, 5FACTOR CONCENTRATES 1992433 12. Finlayson JS, Tankersley DL, Anti-HCV screening and plasmafractionation: the ease against (letter). Lancct 1990;335:1274-5.13. Pneumocystis carina pneumonia among persons with hemophiliaA . MMWR Morb Mortal Wkly Rep 1982;31:365-7.14. Krciss JK, Kitchen LW, Princc HE, Kasper CK, Essex M . Antibody to h...