The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in July 2014. It pursues three core programs: APOGEE-2,MaNGA, and eBOSS. In addition, eBOSS contains two major subprograms: TDSS and SPIDERS. This paper describes the first data release from SDSS-IV, Data Release 13 (DR13), which contains new data, reanalysis of existing data sets and, like all SDSS data releases, is inclusive of previously released data. DR13 makes publicly available 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA,the first data released from this survey. It includes new observations from eBOSS, completing SEQUELS. In addition to targeting galaxies and quasars, SEQUELS also targeted variability-selected objects from TDSS and X-ray selected objects from SPIDERS. DR13 includes new reductions ofthe SDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification. DR13 releases new reductions of the APOGEE-1data from SDSS-III, with abundances of elements not previously included and improved stellar parameters for dwarf stars and cooler stars. For the SDSS imaging data, DR13 provides new, more robust and precise photometric calibrations. Several value-added catalogs are being released in tandem with DR13, in particular target catalogs relevant for eBOSS, TDSS, and SPIDERS, and an updated red-clump catalog for APOGEE.This paper describes the location and format of the data now publicly available, as well as providing references to the important technical papers that describe the targeting, observing, and data reduction. The SDSS website, http://www.sdss.org, provides links to the data, tutorials and examples of data access, and extensive documentation of the reduction and analysis procedures. DR13 is the first of a scheduled set that will contain new data and analyses from the planned ~6-year operations of SDSS-IV.PostprintPeer reviewe

Retiro temprano de esteroides en una cohorte de trasplante renal tratada con tacrolimus, mofetil micofenolato y basiliximab

Antecedentes: No hay suficiente evidencia sobre la frecuencia de rechazo agudo y la funci�n del injerto en los pacientes con retiro temprano de esteroides (RTE). El objetivo del presente estudio es comparar el efecto del RTE sobre la tasa de filtrado glomerular (TFG), la supervivencia/rechazo del injerto en receptores de una cohorte de tratados con tacrolimus/mofetil micofenolato, comparada con un grupo control. Material y m�todos: Cohorte retrospectiva en 60 receptores de bajo riesgo inmunol�gico entre diciembre de 2005 y julio de 2010. Cohorte del estudio (C-RTE; N = 32), el RTE se hizo el 5� d�a mientras recib�an tacrolimus/mofetil micofenolato. La cohorte control (C-C, N = 28) recibi� prednisona/tacrolimus/mofetil micofenolato. Las variables cl�nicas, bioqu�micas e histol�gicas fueron evaluadas al inicio del estudio, y a los 3, 6 y 12 meses de seguimiento. Se utiliz� Kaplan-Meier y el modelo de riesgos proporcionales de Cox para evaluar la supervivencia. Las comparaciones entre cohortes fueron hechas por la t de Student y ?�. Resultados: Durante el seguimiento, la C-C muestra presi�n sangu�nea significativamente mayor tanto sist�lica (125 � 10 frente a 114 � 8) como diast�lica (81 � 8 frente a 72 � 7), glucosa s�rica (96 � 13 frente a 86 � 10), triglic�ridos (177 � 61 frente a 129 � 34), colesterol total (183 � 43 frente a 148 � 34) y colesterol LDL (100 � 22 frente a 87 � 25). La C-C present� una mayor proporci�n de uso de antihipertensivos (57 frente a 13 %) y de estatinas (27 frente a 9 %). La TFGe fue mejor en la C-RTE que en la C-C (85,4 � 20,6 frente a 70,6 � 17,0, p = 0,004). La frecuencia de rechazo agudo fue menor en la C-RTE. Conclusiones: La supervivencia del injerto, la TFG, la tasa de rechazo agudo y el perfil metab�lico fueron mejores en la C-RTE que en la C-C