• We studied 4042 Vietnam era veteran monozygotic and dizygotic male twin pairs to determine
the effects of heredity, shared environment, and unique environment on the liability for …

We propose a method for automatically classifying facial images based on labeled elastic
graph matching, a 2D Gabor wavelet representation, and linear discriminant analysis. Results …

Background Previous research has demonstrated genetic and environmental influences on
abuse of individual substances, but there is less known about how these factors may …

Aicardi-Goutières syndrome (AGS) is a genetic encephalopathy whose clinical features mimic
those of acquired in utero viral infection. AGS exhibits locus heterogeneity, with mutations …

We estimate the magnitude of genetic and shared environmental contributions to risk of
initiation and maintenance of smoking. Genetic models were fitted to data from 2 204 male‐male …

Neuroimaging studies examining the effects of aging and neuropsychiatric disorders on the
cerebral cortex have largely been based on measures of cortical volume. Given that cortical …

Background Nicotine and alcohol dependence often occur together. We examined data
from male twin pairs to determine whether there are genetic or environmental influences …

Research and clinical experience indicate that drug use disorders tend to run in families.
The objective of this study was to distinguish between the family environment and genetic …

Background In comparison with alcohol dependence (AD), relatively little is known about the
causes of pathological gambling (PG). Given the high rate of comorbidity between PG and …

The risk of posttraumatic stress disorder (PTSD) following trauma is heritable, but robust
common variants have yet to be identified. In a multi-ethnic cohort including over 30,000 PTSD …