Francisco Lazaro

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Celiac disease (CD) is characterized by a striking expansion of gamma delta T cells in the intestine. These cells interact with MICA, a cell surface protein encoded by a major histocompatibility complex gene. We investigated whether MICA gene polymorphism could contribute to susceptibility to CD. DNA typing for HLA-DR, DQA1, DQB1, TNF-308, TNFa, TNFb and a(More)
Three fluoroquinolone-resistant Brucella melitensis mutants were obtained after successive passages on norfloxacin-containing agar plates. The original strain was B. melitensis biovar 2 ATCC 23457. Mutants emerged at frequencies ranging between 1 x 10(-6) and 3 x 10(-8). The three mutants showed a gyrA Ala71-->Ser mutation as well as insertion of Ala340. No(More)
Eustachian tube (ET) disfunction, alone or combined with other factors, is the main source of middle ear pathogenesis and can lead to other physiopathological events that originate disease (serous otitis media, adhesive otitis, cholesteatoma). In seven Wistar rats (study group), experimental mechanical obstruction of the left Eustachian tube was performed.(More)
Selective IgA deficiency (IgAD) is the most common form of primary immunodeficiency. Its association with genes within the major histocompatibility complex (MHC) has been repeatedly reported. Recently the susceptibility gene has been located in the class III region, around the tumor necrosis factor (TNF) cluster. In this study we have examined IgAD(More)
—In this paper q-ary Raptor codes under ML decoding are considered. An upper bound on the probability of decoding failure is derived using the weight enumerator of the outer code, or its expected weight enumerator if the outer code is drawn randomly from some ensemble of codes. The bound is shown to be tight by means of simulations. This bound provides a(More)
BACKGROUND The role of galactomannan (GM) in serum or bronchoalveolar lavage fluid (BALF) for the diagnosis of invasive pulmonary aspergillosis (IPA) has been extensively evaluated in hematological patients, however its performance in non-hematological patients is not well established. METHODS We performed a multicenter retrospective study in 3 university(More)
Idiopathic achalasia is a motility disorder of the esophagus whose etiology is unknown. An association between HLA genes and susceptibility to achalasia which suggests a possible immunogenetic mechanism has been reported recently. This study was designed to examine the HLA class II association in a large group of achalasia patients further and to(More)
—In this paper we present a finite-length analysis of frameless ALOHA for a k multiuser detection scenario, i.e., assuming the receiver can resolve collisions of size k or smaller. The analysis is obtained via a dynamical programming approach, and employed to optimize the scheme's performance. We also assess the optimized performance as function of k.(More)
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