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https://www.selleckchem.com/products/gsk3326595-epz015938.html setting. Level IV-case series. Level IV-case series.Congenital tibial pseudarthrosis is a rare condition seen in neurofibromatosis type 1 (NF1), and treatment is complex. A randomized, placebo-controlled trial of bone morphogenetic protein (rhBMP-2; INFUSE bone graft) at time of tibial surgery was developed by the Neurofibromatosis Clinical Trials Consortium. Patients were randomized to receive rhBMP-2 that would, or would not, be added to the standard surgical procedure consisting of resection of pseudarthrosis tissue, insertion of a rigid intramedullary rod, and placement of autogenous iliac crest bone graft. Despite involvement of 16 centers with wide experience with NF1 orthopaedic management, only 5 patients (of 54 required) were able to be enrolled in the study during a 3-year time period. Because of the inability to recruit sufficient patients, this study was closed in June 2019, with plans to terminate. The obstacles that were encountered during the study are summarized. The authors question whether a randomized, placebo-controlled trial of a rare pediatric orthopaedic condition is possible to accomplish. Recommendations are provided to guide future studies of orthopaedic manifestations of NF1.Level of Evidence Level V.There is a strong link between cigarette smoking and pulmonary complications among people living with HIV. However, the effects of smoking on the local lung immune environment in this population remain unclear. Bronchoalveolar lavage and saliva were collected from HIV-infected smokers involved in a prospective study investigating alveolar macrophage expression of host defense molecules. Salivary cotinine concentrations were inversely related to expression of the immune cell receptor nucleotide-binding oligomerization domain-2 and the cathelicidin antimicrobial peptide LL-37. The negative correlation between salivary cotinine and LL-37 was particularly strong. Our study provides ins

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