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Let A be a (0, 1, *)-matrix with main diagonal all 0's and such that if a i,j = 1 or * then a j,i = * or 0. Under what conditions on the row sums, and or column sums, of A is it possible to change the * 's to 0's or 1's and obtain a tournament matrix (the adjacency matrix of a tournament) with a specified score sequence? We answer this question in the case(More)
RATIONALE Several studies suggest that nasal nitric oxide (nNO) measurement could be a test for primary ciliary dyskinesia (PCD), but the procedure and interpretation have not been standardized. OBJECTIVES To use a standard protocol for measuring nNO to establish a disease-specific cutoff value at one site, and then validate at six other sites. METHODS(More)
Primary ciliary dyskinesia (PCD) is an autosomal recessive disease in which ciliary dysfunction leads to chronic lung, sinus, and middle ear disease. PCD is often not diagnosed until late childhood due to its presumed rarity and the technical expertise necessary for diagnosis; as such, little is known about lung disease in young children with PCD. We report(More)
BACKGROUND Autologous chondrocyte implantation (ACI) involves the use of a periosteal patch (ACI-P) as a cover for transplanted chondrocytes. Theoretically, this periosteal patch provides mesenchymal stem cells and growth factors that encourage chondrocyte development/differentiation. However, there is a significant rate of graft hypertrophy with the use of(More)
OBJECTIVE Respiratory syncytial virus (RSV) has been identified as an important cause of lower respiratory tract disease in infants. In patients at high risk, prevention is attempted through immunoprophylaxis with palivizumab. In 2008, as a result of revisions to the American Academy of Pediatrics' guidelines, South Carolina Medicaid reduced the number of(More)
A directed graph is an interval digraph if to each vertex v there corresponds an ordered pair of intervals (S v , T v) such that u → v if and only if S u ∩ T v = ∅. A tournament is an oriented complete graph. We characterize the tournaments that are interval digraphs via the existence of a large transitive subtournament and by forbidden subtournaments. A(More)
An ecologically based classification system, when accompanied by digitized biotic community maps, has been shown to be useful for plotting and assessing plant and animal affinities in the American Southwest and northwestern Mexico. Because plant distributions are closely tied to climatic and environmental parameters, biotic community maps can be especially(More)