Zhang Yunxia

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OBJECTIVE Use systematic review methods to quantify the association between prostatitis and prostate cancer, under both fixed and random effects model. EVIDENCE ACQUISITION Case control studies of prostate cancer with information on prostatitis history. All studies published between 1990-2012, were collected to calculate a pooled odds ratio. SELECTION(More)
Under the natural ventilation conditions, two stages nitrogen oxides (NOx, converted from NO<sub>2</sub>), carbon monoxide (CO) in the air of Yangbajing 1# tunnel were monitored. Time and space distribution of NOx and CO content in the tunnel was analyzed. Just only 4 min after the trains run through the monitoring points, NOx concentration were less than 2(More)
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