Results 181 to 190 of about 1,808,699 (310)
Molecular Oncology, EarlyView.Pre‐analytical handling critically determines liquid biopsy performance. This study defines practical best‐practice conditions for cell‐free DNA (cfDNA) and extracellular vesicle–derived DNA (evDNA), showing how processing time, storage conditions, tube type, and plasma input volume affect DNA integrity and mutation detection.
Jonas Dohmen +11 more
wiley +1 more source
Imputing missing genotypes with weighted k nearest neighbors [PDF]
Motivation: Missing values are a common problem in genetic association studies concerned with single nucleotide polymorphisms (SNPs). Since most statistical methods cannot handle missing values, they have to be removed prior to the actual analysis ...
Schwender, Holger, Ickstadt, Katja
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Flexible Imputation of Missing Data
Journal of Statistical Software, 2018 Hakan Demirtas
doaj +1 more source
missForestPredict-Missing data imputation for prediction settings. [PDF]
PLoS OneAlbu E, Gao S, Wynants L, Van Calster B.
europepmc +1 more source
Molecular Oncology, EarlyView.Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau +36 more
wiley +1 more source
Propensity score matching with missing covariates via iterated, sequential multiple imputation
, 2011 In many observational studies, analysts estimate causal effects using propensity score matching. Estimation of propensity scores is complicated when covariate values intended for collection are in fact missing. To handle the missing data, one approach is
Reiter, Jerome P., Mitra, Robin
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Missing data considerations for patient reported outcome measures in randomized controlled trials. [PDF]
J Patient Rep OutcomesWang F +12 more
europepmc +1 more source
Molecular Oncology, EarlyView.Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang +12 more
wiley +1 more source
Empirical econometric evaluation of alternative methods of dealing with missing values in investment climate surveys [PDF]
Investment climate Surveys are valuable instruments that improve our understanding of the economic, social, political, and institutional factors determining economic growth, particularly in emerging and transition economies.
Pena, Jorge +2 more
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