Publications by authors named "M G Koolen"

Curiosity-driven exploration involves actively engaging with the environment to learn from it. Here, we hypothesize that the cognitive mechanisms underlying exploratory behavior may differ across individuals depending on personal characteristics such as autistic traits. In turn, this variability might influence successful exploration.

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Purpose: To determine incidence, timing and potential risk factors associated with hypoglycemia in the first day of life in very premature infants.

Methods: Retrospective cohort study including all infants born before 32 weeks of gestation between 1 July 2017 and 31 December 2020 in the Erasmus MC Sophia Children's Hospital (Rotterdam, the Netherlands). Excluded were those who died within 24 h after birth or with no glucose data available.

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The purpose of this study was to study psychopathological and temperamental correlates of selective mutism (SM) (symptoms) in a mixed sample of non-clinical (n = 127) and clinically referred (n = 42, of whom 25 displayed the selective non-speaking behavior that is prototypical for SM) 6- to 12-year-old children. Parents completed questionnaires to measure their child's symptom levels of selective mutism, social anxiety, autism spectrum disorder, and the temperament trait of behavioral inhibition. The results first and foremost showed that SM symptoms were clearly linked to social anxiety and an anxiety-prone temperament (behavioral inhibition), but findings also suggested that autism spectrum problems are involved in the selective non-speaking behavior of children.

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Article Synopsis
  • * Participants in the 25 mg group showed a significant reduction in depression scores after 3 weeks, with a mean change of -12.0, compared to -7.9 for 10 mg and -5.4 for the control group.
  • * Although the higher dose showed benefits, many participants experienced adverse effects, including headache and nausea, and some reported suicidal thoughts, underscoring the need for further research.
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The aim of the current study is to assess the biological performance of self-healing hydrogels based on calcium phosphate (CaP) nanoparticles and bisphosphonate (BP) conjugated hyaluronan (HA) in a critical size segmental femoral bone defect model in rats. Additionally, these hydrogels are loaded with bone morphogenetic protein 2 (BMP-2) and their performance is compared in healthy and osteoporotic bone conditions. Treatment groups comprise internal plate fixation and placement of a PTFE tube containing hydrogel (HA -CaP) or hydrogel loaded with BMP-2 in two dosages (HA -CaP-lowBMP2 or HA -CaP-highBMP2).

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