Since 2000-2001, dengue virus type 1 has circulated in the Pacific region. However, in 2007, type 4 reemerged and has almost completely displaced the strains of type 1. If only 1 serotype circulates at any time and is replaced approximately every 5 years, DENV-3 may reappear in 2012.
PURPOSE The ability of older adults to perform activities of daily living (ADL) declines with age. One possible reason could be that older adults require substantially greater effort than younger adults to perform similar ADL. This study examined the effects of age on the biomechanics of muscular effort in healthy adults during isometric torque production… (More)
INTRODUCTION Blood pressure is a major cause of cardiovascular disease (CVD) and both may increase as outdoor temperatures fall. However, there are still limited data about seasonal variation in blood pressure and CVD mortality among patients with prior-CVD. METHODS We analysed data on 23 000 individuals with prior-CVD who were recruited from 10 diverse… (More)
BACKGROUND Drinking alcohol has a long tradition in Chinese culture. However, data on the prevalence and patterns of alcohol consumption in China, and its main correlates, are limited. METHODS During 2004-08 the China Kadoorie Biobank recruited 512,891 men and women aged 30-79 years from 10 urban and rural areas of China. Detailed information on alcohol… (More)
E. Duchêne and S. Gravier present the following open problem: In Wythoff's game, each player can either remove at most R tokens from a single heap (i.e. there is an upper bound R on the number of removing tokens), or remove the same number of tokens from both heaps but there is no upper bound on the number of removing tokens. This open problem is… (More)