incidence of adolescent pregnancy.3 Access to contraceptives has become increasingly crucial for adolescents because many are sexually active at earlier ages than in the past. During the mid-to-late 1950s, 8% of adolescent females had had intercourse by age 16. In contrast, by the early-to-mid–1980s, 21% of female teenagers had had sex by age 16. Among all adolescents in the 1990s, 50% had sex ...

The mechanistic understanding of interactions between diet-derived substances and conventional medications in humans is nascent. Most investigations have examined cytochrome P450–mediated interactions. Interactions mediated by other phase I enzymes are understudied. Aldehyde oxidase (AO) is a phase I hydroxylase that is gaining recognition in drug design and development programs. Taken together...

Since the establishment of the first point-to-point radio communication by GuglielmoMarconi in 1895, the complexity of communication systems has grown dramatically in the continuing search for higher system capacity, higher data rates, and bandwidth efficiency. Research in information theory and digital signal processing has been the foundation for the development of systems that are able to ha...

PURPOSE We aimed to investigate serum levels of matrix metalloproteinase-9 in both subarachnoid hemorrhage and control groups for prediction of cerebral vasospasm in this study. METHODS Venous serum matrix metalloproteinase-9 levels were prospectively measured four times (days 1, 3, 7, and 14) for 34 consecutive patients with subarachnoidal hemorrhage (n = 27) and for elective aneurysm clippi...