Results 31 to 40 of about 1,867,915 (314)

Poor implementation of non-invasive sampling in wildlife genetics studies [PDF]

open access: yesRethinking Ecology, 2019
The Earth’s biodiversity is currently experiencing immense pressure from habitat loss, overexploitation, global climate change, and invasive species, which escalate the global extinction crisis.
Miriam A. Zemanova
doaj   +3 more sources

Similar risk for hemangiomas after amniocentesis and transabdominal chorionic villus sampling [PDF]

open access: yes, 2012
Aim: In an earlier study we have shown that transcervical chorionic villus sampling in excess of 90 mg increases the risk for hemangiomas of infancy three- to four-fold compared to amniocentesis.
Zeebregts, Clark J.   +17 more
core   +1 more source

Sample size: how many participants do I need in my research? [PDF]

open access: yesAnais Brasileiros de Dermatologia, 2014
The importance of estimating sample sizes is rarely understood by researchers, when planning a study. This paper aims to highlight the centrality of sample size estimations in health research.
Jeovany Martínez-Mesa   +4 more
doaj   +1 more source

VAMS-Based Blood Capillary Sampling for Mass Spectrometry-Based Human Metabolomics Studies

open access: yesMetabolites, 2023
Volumetric absorptive microsampling (VAMS) is a recently developed sample collection method that enables single-drop blood collection in a minimally invasive manner.
Chiara Volani   +6 more
doaj   +1 more source

A general method to determine sampling windows for nonlinear mixed effects models with an application to population pharmacokinetic studies [PDF]

open access: yes, 2012
Optimal design methods have been proposed to determine the best sampling times when sparse blood sampling is required in clinical pharmacokinetic studies. However, the optimal blood sampling time points may not be feasible in clinical practice.
Stephen Duffull   +5 more
core   +1 more source

Simulation Studies for Complex Sampling Designs

open access: yesAustrian Journal of Statistics, 2016
Choosing the appropriate variance estimation method in complex surveys is a difficult task since there exist a variety of techniques which usually cannot be compared mathematically. A relatively easy way to accomplish such a comparison is on the basis of
Helga Wagner, Doris Eckmair
doaj   +1 more source

Sampling: how to select participants in my research study? [PDF]

open access: yesAnais Brasileiros de Dermatologia, 2016
: Background: In this paper, the basic elements related to the selection of participants for a health research are discussed. Sample representativeness, sample frame, types of sampling, as well as the impact that non-respondents may have on results of a
Jeovany Martínez-Mesa   +4 more
doaj   +2 more sources

A review of current ambulatory assessment studies in adolescent samples and practical recommendations [PDF]

open access: yes, 2019
The use of ambulatory assessment (AA) and related methods (experience sampling, ecological momentary assessment) has greatly increased within the field of adolescent psychology.
Chung, JM   +8 more
core   +1 more source

Doing Online Surveys: Zum Einsatz in der sozialwissenschaftlichen Raumforschung

open access: yesRaumforschung und Raumordnung, 2015
Empirical social research made use of online surveys since the mid-1990s. However, there is no significant methodological debate about this empirical tool in socio-scientific regional studies.
Robert Nadler   +2 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

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