J. Stephen Ferris

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To study the role of oxidative stress in breast cancer risk, we analysed plasma levels of protein carbonyls in 1050 cases and 1107 controls. We found a statistically significant trend in breast cancer risk in relation to increasing quartiles of plasma protein carbonyl levels (OR = 1.2, 95% CI = 0.9-1.5; OR = 1.5, 95% CI = 1.2-2.0; OR = 1.6, 95% CI =(More)
The current study was conducted to characterize the ontogeny of novel object recognition in rats. Initial testing (Experiment 1) was conducted in a square arena and it was observed that 21-day-old animals would often pause in the corners, greatly increasing between-subject variability and performance in this test. Significantly greater object exploration(More)
Epigenetic modifications may be one mechanism linking early life factors, including parental socioeconomic status (SES), to adult onset disease risk. However, SES influences on DNA methylation patterns remain largely unknown. In a US birth cohort of women, we examined whether indicators of early life and adult SES were associated with white blood cell(More)
Methylphenidate (Ritalin) is used in the treatment of attention-deficit hyperactivity disorder. Surprisingly, little research has been conducted on the effects of methylphenidate during early development. Therefore, the present study was conducted to examine the effects of methylphenidate on object exploration in developing rats. Male and female weanling(More)
We dedicate the paper to the memory of our colleague, W. Irwin Gillespie. This is a substantially revised version of a draft previously titled 'Searching for Keynes'. We are grateful for helpful comments from Abstract Keynes' General Theory (1936) is arguably one of the most important books of the twentieth century. His ideas for stabilizing the aggregate(More)
BACKGROUND Oral contraceptive use has been consistently associated with a reduced risk of ovarian cancer in unrelated, average risk women; however little data exist on whether this benefit extends to higher risk women from cancer families. To examine this, we conducted family-based analyses using the Breast Cancer Family Registry. METHODS We used(More)
This paper frames policy debates around the appropriate choice of currency regimes for developing and transition economies, by clarifying and articulating arguments drawn from the scientific and applied economics literatures. In particular, arguments for, and against, " fixed " vs. " flexible " exchange rate regimes are elaborated and evaluated, including(More)