WILLIAMS, J. W., EIKMAN, E. A., GREENBERG, S. H., HEWITT, J. C., LOPEZ-CUENCA, E., JONES, G. P., & MADDEN, J. A. (1978). Failure of Low Dose Heparin to Prevent Pulmonary Embolism After Hip Surgery Or Above The Knee Amputation. Annals of Surgery, 188(4), 468–474. https://doi.org/10.1097/00000658-197810000-00004

WILLIAMS, JAMES W., EDWARD A. EIKMAN, STEPHEN H. GREENBERG, J C. A. R. L. I. S. L. E. HEWITT, E. N. R. I. Q. U. E. LOPEZ-CUENCA, G P. I. E. R. C. E. JONES, and JOSEPH A. MADDEN. “Failure of Low Dose Heparin to Prevent Pulmonary Embolism After Hip Surgery Or Above The Knee Amputation.” Annals of Surgery 188, no. 4 (October 1978): 468–74. https://doi.org/10.1097/00000658-197810000-00004.

WILLIAMS JW, EIKMAN EA, GREENBERG SH, HEWITT JC, LOPEZ-CUENCA E, JONES GP, et al. Failure of Low Dose Heparin to Prevent Pulmonary Embolism After Hip Surgery Or Above The Knee Amputation. Annals of Surgery. 1978 Oct;188(4):468–74.

WILLIAMS, JAMES W., et al. “Failure of Low Dose Heparin to Prevent Pulmonary Embolism After Hip Surgery Or Above The Knee Amputation.” Annals of Surgery, vol. 188, no. 4, Ovid Technologies (Wolters Kluwer Health), Oct. 1978, pp. 468–74. Crossref, doi:10.1097/00000658-197810000-00004.

WILLIAMS JW, EIKMAN EA, GREENBERG SH, HEWITT JC, LOPEZ-CUENCA E, JONES GP, MADDEN JA. Failure of Low Dose Heparin to Prevent Pulmonary Embolism After Hip Surgery Or Above The Knee Amputation. Annals of Surgery. Ovid Technologies (Wolters Kluwer Health); 1978 Oct;188(4):468–474.