The concept of expressing acidity as the negative logarithm of the hydrogen ion concentration was defined and termed pH in the beginning of the 20th century. Th

In the United States, some populations suffer from far greater disparities in health than others. Those disparities are caused not only by fundamental differenc

Based on careful analysis of burden of disease and the costs ofinterventions, this second edition of 'Disease Control Priorities in Developing Countries, 2nd ed

There have always been homeless people in the United States, but their plight has only recently stirred widespread public reaction and concern. Part of this new