The first HIV antibody screening assays were licensed by the Food and Drug Administration (FDA) in March of 1985. By late summer of 1985 the insurance industry had begun to utilize these test to assess an individual's risk of developing AIDS. At this point the etiological agent responsible for the disease was thought to be part of a family of viruses known as the Human T-Lymphotrophic Virus and...

Using data from China’s 1990 and 2000 censuses, this paper examines interprovincial migration by describing its spatial patterns and estimating models based on the gravity approach. Between the censuses, interprovincial migration increased considerably in size and became more unidirectional and concentrated. Modeling results highlight the role of regional economic disparity and migration stock,...

BACKGROUND/PURPOSE Controversy exists in the literature regarding whether dentists with multiple occupational exposures suffer from premature mortality. A cohort mortality study was conducted to evaluate the survival outcome and determine if potential exposure to harmful agents leads to premature mortality among dentists. METHODS Using the Life Table Analysis System, we calculated standardize...

BACKGROUND Over the past decade, calcium channel blockers (CCBs) and ACE inhibitors have been used increasingly in the treatment of hypertension. In contrast, beta-blocker and diuretic use has decreased. It has been suggested that pharmaceutical marketing has influenced these prescribing patterns. No objective analysis of advertising for antihypertensive therapies exists, however. METHODS AND...