On 22 March 2013, 150 of 1,255 students (13–17 years) and staff at a school in London reported gastrointestinal symptoms; onset peaked 8 to 12 hours after a lunch served in the school on 21 March. We performed a retrospective cohort study of all students and staff. We defined cases as school attenders on 20 and 21 March with onset of gastrointestinal symptoms between 20 and 23 March. We tested ...

Article history: Received 20 March 2009 Received in revised form 20 August 2009 Available online 22 November 2009

Many theoretical models of labor market search imply a tight link between worker flows (hires and separations) and job gains and losses at the employer level. Partly motivated by these theories, we exploit establishment-level data from U.S. sources to study the relationship between worker flows and job flows in the cross section and over time. We document strong, highly nonlinear relationships ...

Colorectal cancer is a devastating disease, especially for patients with unresectablemetastatic lesions. Niels Halama (Heidelberg, Germany) and colleagues set out to investigate the local immunologicalmicroenvironment in colorectal cancer liver metastases. With a sophisticated approach utilizing whole slide image quantification and multiplex proteomics, the spatial profile revealed an unexpecte...

We evaluate the cohesive energies E b of four systems in which particles move on a cylindrical surface, at fixed distance R from the axis. We find quite nonuniversal dependences of E b on R. For the Coulomb binding problem, E b is a monotonically decreasing function of R. For three problems involving Lennard-Jones interactions, the behavior is nonmonotonic; E b is larger at R = ∞ than at R=0; t...

Internal gravity waves are generated as adjustment radiation whenever a sudden change in forcing causes the atmosphere to depart from its large-scale balanced state. Such a forcing anomaly occurs during a solar eclipse, when the Moon's shadow cools part of the Earth's surface. The resulting atmospheric gravity waves are associated with pressure and temperature perturbations, which in principle ...