[Fetal exposure to bisphenol A: Presence of bisphenol A in urine of pregnant women assisted in a hospital in the City of Buenos Aires. Year 2013].

Introduction: Bisphenol A (BPA) is an endocrine disruptor (ED) possibly linked to adverse reproductive and neurodevelopmental effects that is used as an additive in food and beverage containers. There are no data of BPA levels in the Argentine population. The objective of this study was to measure BPA in the urine of pregnant women.

Author Correction: Warming shortens flowering seasons of tundra plant communities.

In the version of this Article originally published, the following sentence was missing from the Acknowledgements: "This work was supported by the Norwegian Research Council SnoEco project, grant number 230970". This text has now been added.

Warming shortens flowering seasons of tundra plant communities.

Advancing phenology is one of the most visible effects of climate change on plant communities, and has been especially pronounced in temperature-limited tundra ecosystems. However, phenological responses have been shown to differ greatly between species, with some species shifting phenology more than others. We analysed a database of 42,689 tundra plant phenological observations to show that warmer temperatures are leading to a contraction of community-level flowering seasons in tundra ecosystems due to a greater advancement in the flowering times of late-flowering species than early-flowering species.

[Training students on research, while studying Pediatrics in the School of Medicine. Teaching experience].

Research is important during university education. The objective was to describe the teaching of an exercise in clinical research and its perception by students. Medical students conducted a research work in groups coordinated by a tutor.

Climatic warming strengthens a positive feedback between alpine shrubs and fire.

Climate change is expected to increase fire activity and woody plant encroachment in arctic and alpine landscapes. However, the extent to which these increases interact to affect the structure, function and composition of alpine ecosystems is largely unknown. Here we use field surveys and experimental manipulations to examine how warming and fire affect recruitment, seedling growth and seedling survival in four dominant Australian alpine shrubs.

Modeling rates of life form cover change in burned and unburned alpine heathland subject to experimental warming.

Elevated global temperatures are expected to alter vegetation dynamics by interacting with physiological processes, biotic relationships and disturbance regimes. However, few studies have explicitly modeled the effects of these interactions on rates of vegetation change, despite such information being critical to forecasting temporal patterns in vegetation dynamics. In this study, we build and parameterize rate-change models for three dominant alpine life forms using data from a 7-year warming experiment.

Phenological response of tundra plants to background climate variation tested using the International Tundra Experiment.

The rapidly warming temperatures in high-latitude and alpine regions have the potential to alter the phenology of Arctic and alpine plants, affecting processes ranging from food webs to ecosystem trace gas fluxes. The International Tundra Experiment (ITEX) was initiated in 1990 to evaluate the effects of expected rapid changes in temperature on tundra plant phenology, growth and community changes using experimental warming. Here, we used the ITEX control data to test the phenological responses to background temperature variation across sites spanning latitudinal and moisture gradients.

SWAP-70 restricts spontaneous maturation of dendritic cells.

Spontaneous maturation observed in dendritic cell (DC) cultures has been linked to their capacity to induce immune responses. Despite several recent studies, the mechanisms and signals triggering spontaneous maturation of DCs are largely unknown. We found that the absence of SWAP-70 causes spontaneous maturation of spleen- and bone marrow-derived DCs and, in vivo, of spleen-resident CD11c(+)CD11b(+)CD8α(-) DCs.

Variable temperature effects of Open Top Chambers at polar and alpine sites explained by irradiance and snow depth.

Environmental manipulation studies are integral to determining biological consequences of climate warming. Open Top Chambers (OTCs) have been widely used to assess summer warming effects on terrestrial biota, with their effects during other seasons normally being given less attention even though chambers are often deployed year-round. In addition, their effects on temperature extremes and freeze-thaw events are poorly documented.

Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time.

Understanding the sensitivity of tundra vegetation to climate warming is critical to forecasting future biodiversity and vegetation feedbacks to climate. In situ warming experiments accelerate climate change on a small scale to forecast responses of local plant communities. Limitations of this approach include the apparent site-specificity of results and uncertainty about the power of short-term studies to anticipate longer term change.

Thrombin injection failure with subsequent successful stent-graft placement for the treatment of an extracranial internal carotid pseudoaneurysm in a 5-year-old child.

Internal carotid artery pseudoaneurysm is a rare life-threatening condition that may develop in different clinical situations. We report the case of an extracranial internal carotid artery pseudoaneurysm secondary to a throat infection in a pediatric patient that was initially treated with percutaneous thrombin injection under ultrasound guidance. However, recanalization occurred at 48 h, and definitive treatment was then performed by endovascular stent-graft placement.

Sphingosine 1-phosphate-induced motility and endocytosis of dendritic cells is regulated by SWAP-70 through RhoA.

The phospholipid mediator sphingosine 1-phosphate (S1P) enhances motility and endocytosis of mature dendritic cells (DCs). We show that in vitro migration of Swap-70(-/-) bone marrow-derived DCs (BMDCs) in response to S1P and S1P-induced upregulation of endocytosis are significantly reduced. S1P-stimulated movement of Swap-70(-/-) BMDCs, specifically retraction of their trailing edge, in a collagen three-dimensional environment is impaired.

[The choking game in adolescence, between experimentation and risk].

In the last year there was happened a series of adolescent deaths in the province of Salta that might be related to a dangerous game known as "the choking game". It has been practiced over many years in different countries around the world and consists of provoking brain hypoxia for some seconds by different techniques to obtain an instant of ecstasy and pleasure. We consider relevant that health providers know about this practice and so be able to recognize through signs and symptoms when an adolescent might be playing this game.

[Greeting modalities preferred by patients in pediatric ambulatory setting].

Introduction: The greeting is the first form of verbal and nonverbal communication and is a valuable tool to support the physician-patient relationship.

Objective: Assess parents and children preferences on how they want pediatricians greet and address them.

Material And Methods: Cross-sectional study.

Impact of divorce on the quality of life in school-age children.

Objective: To assess psychosocial quality of life in school-age children of divorced parents.

Methods: A cross-sectional survey was conducted at the pediatric outpatient clinic of a community hospital. Children 5 to 12 years old from married families and divorced families were included.

[Use of alternative or complementary medicine by the pediatric population of a community hospital].

Introduction: Consultation to complementary and alternative medicines (CAM) in the pediatric population is becoming more frequent.

Objectives: To assess the prevalence of the consultations, the communication with their doctors and the characteristics of patients and families who consult CAM.

Methods: A transversal study was done.

SWAP-70 regulates RhoA/RhoB-dependent MHCII surface localization in dendritic cells.

Stimulated dendritic cells (DCs) mature and migrate to lymphoid organs to prime naive T cells. DC maturation augments antigen-presentation capacity of DCs by increasing peptide loading, half-life, and cell surface localization of MHC molecules. Activated SWAP-70(-/-) DCs fail to properly localize MHCII molecules in the plasma membrane, are strongly impaired in T-cell activation, and are altered in F-actin rearrangement.

Plant community responses to experimental warming across the tundra biome.

Recent observations of changes in some tundra ecosystems appear to be responses to a warming climate. Several experimental studies have shown that tundra plants and ecosystems can respond strongly to environmental change, including warming; however, most studies were limited to a single location and were of short duration and based on a variety of experimental designs. In addition, comparisons among studies are difficult because a variety of techniques have been used to achieve experimental warming and different measurements have been used to assess responses.

Has mortality in drug addicts increased? A comparison between two hospitalized cohorts in Stockholm.

Background: Substance abusers are known to have a high mortality, but the mortality rate and cause of death pattern has varied between studies and over time. The aim of the study was to compare the mortality in two cohorts of hospitalized drug addicts in Stockholm County identified in 1971-1972 and 1980-1981, respectively.

Method: Two cohorts consisting of all patients admitted for drug dependence in 1971-1972 and in 1980-1981, were selected from Stockholm County inpatient register.