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BACKGROUND Orthotopic liver transplantation (OLT) sometimes requires large amounts of blood. An adequate supply of Rh-negative blood for Rh-negative patients is not always available. STUDY DESIGN AND METHODS Seventeen Rh-negative patients, out of 327 receiving OLT in this hospital, received from 5 to 41 units of Rh-positive red cells during surgery. Each(More)
Forty-two cases of Ewing's sarcoma (ES) have been studied with light microscopy during the 9-year period 1974 to 1982. Thirty-three patients had ES of bone, and in 9 patients the tumor was located in the extraskeletal soft tissues. Cases which fulfilled all the morphologic criteria were accepted as typical ES (31 cases), and those with some architectural or(More)
The objective of this paper is to propose a performance failure prediction methodology for FPGA-based designs, based on the use of a novel built-in programmable delay sensor. Digital Clock Managers (DCM) is used to fine tune the unsafe observation interval. The design procedure is described, including the constrained placement of some delay sensors. The(More)
FPGAs (" Field Programmable Gate Arrays ") constitute the base of many complex electronic systems with different applications ranging from the automotive sector to the multimedia market. Due to integrated circuits fabrication progress, current FPGAs includes very complex embedded digital blocks as serial transceivers or memory blocks. Therefore FPGA(More)
An ultrastructural and immunohistochemical study was performed on three malignant lymphomas of follicular center cell origin with signet-ring cells. The first case corresponded to a diffuse lymphoma with follicular center cells and plasmacytic features; the other two cases corresponded to the nodular centrocytic-centroblastic category. The neoplastic(More)