0000000000643704
AUTHOR
P. Redondo
A giant exoplanet orbiting a very-low-mass star challenges planet formation models
Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than gas giants around low-mass stars, as predicted by the core accretion theory of planet formation. We report the discovery of a giant planet around the very-low-mass star GJ 3512, as determined by optical and near-infrared radial-velocity observations. The planet has a minimum mass of 0.46 Jupiter masses, very high for such a small host star, and an eccentric 204-day orbit. Dynamical models show that the high eccentricity is most likely due to planet-planet interactions. We use simulations to demonstrate that the GJ 3512 planetary system challenges generally accepted formation theories, and that it puts con…
Influenza vaccine effectiveness in preventing outpatient, inpatient, and severe cases of laboratory-confirmed influenza.
Background. In most seasons, the influenza vaccine is effective in preventing influenza, but it is not clear whether it is equally effective in preventing mild and severe cases. We designed a case-control study to compare the effectiveness of the influenza vaccine in preventing outpatient, inpatient, and severe or fatal cases of laboratory-confirmed influenza. Methods. Hospitalized patients (n = 691) with laboratory-confirmed influenza in the 2010–2011 season recruited in 29 Spanish hospitals were individually matched by age, admission/visit date, and province with an outpatient with laboratory-confirmed influenza and an outpatient control. Severe cases were considered those patients admitt…
Revisión de los términos que definen un carcinoma epidermoide cutáneo asociado a mal pronóstico
Resumen El carcinoma epidermoide cutaneo (CEC) es el segundo tumor mas frecuente en humanos y tiene una incidencia creciente e infraestimada. En la literatura nos encontramos con terminos como CEC de alto riesgo, CEC localmente avanzado, CEC metastasico, CEC avanzado y CEC agresivo, que pueden dar lugar a confusion y que en algunas ocasiones no se encuentran del todo bien definidos. En esta revision pretendemos aclarar estos conceptos con la idea de lograr homogeneidad en su descripcion, algo que parece necesario a la luz de los nuevos farmacos aprobados y en desarrollo para este tumor.