The April-June 2006 edition of JSLS contained 2 disturbing papers addressing technical aspects of vascular control in laparoscopic donor nephrectomies. Lallas et al report an algorithm developed during a series of 200 cases performed at the Mayo Clinic in Scottsdale, Arizona in which “early vessel branching or a potential for inadequate vessel length” prompted the use of Hem-o-lok clips on the ...

In recent years odds ratios have become widely used in medical reports—almost certainly some will appear in today’s BMJ. There are three reasons for this. Firstly, they provide an estimate (with confidence interval) for the relationship between two binary (“yes or no”) variables. Secondly, they enable us to examine the effects of other variables on that relationship, using logistic regression. ...

As in the case of BPP, we can reduce the error probability of any MA protocol to be less than an inverse exponential in the input size. Here’s how. Let L ∈ MA be any language. Let R(x, y, z) be a polytime relation for L such that, for every x ∈ L, there is a y with Prz[R(x, y, z) = 1] ≥ 3/4; and for every x 6∈ L, for every y, it holds that Prz[R(x, y, z) = 1] ≤ 1/4. Consider a new protocol wher...

BACKGROUND The association between Helicobacter pylori infection and gastric cancer has been identified recently. However, the molecular mechanism remained largely unknown. METHODS AND RESULTS We found that miR-141 was decreased in Helicobacter pylori positive specimens (n=75) compared with negative tissues (n=75). The knockdown of miR-141 enhanced the invasion ability of gastric cancer cells...

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