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A major component of variation in body height is due to genetic differences, but environmental factors have a substantial contributory effect. In this study we aimed to analyse whether the genetic architecture of body height varies between affluent western societies. We analysed twin data from eight countries comprising 30,111 complete twin pairs by using(More)
Knowledge about the balance between heritable and nonheritable risk in multiple sclerosis (MS) is based on twin studies in high-prevalence areas. In a study that avoided ascertainment limitations and directly compared continental Italy (medium-prevalence) and Sardinia (high-prevalence), we ascertained 216 pairs from 34,549 patients. This gives a twinning(More)
A polymorphism in the interleukin 12B gene was recently reported to be strongly associated with type 1 diabetes in 422 Australian and British families. We analyzed the same polymorphism in 470 Italian type 1 diabetic patients and 544 matched control subjects and found no evidence of association with the disease. T ype 1 diabetes is caused by the(More)
BACKGROUND The Italian Twin Registry (ITR) has been carrying out several genetic-epidemiological studies. Collection and storage of biological material from study participants has recently increased in the light of biobanking development. Within this scenario, we aimed at investigating understanding, awareness and attitude towards blood/DNA donation of(More)
BACKGROUND AND PURPOSE Few family studies reported moderate genetic impact on the presence and scores of carotid plaques. However, the heritability of carotid plaque characteristics remains still unclear. Twin studies more reliably estimate the relative contribution of genes to these traits in contrast to family study design. METHODS One hundred(More)
Subsequent to a genomic linkage study on Sardinian and Continental Italian families, we considered the possibility that some of the tested microsatellite markers showed association to MS. Markers selected on the basis of the data obtained in the original set of 70 multiplex families were tested for MS association in an additional set of 154 simplex(More)
Sir, We read with interest the paper by Westerlind et al. (2014) on the familial risk in multiple sclerosis. They applied an extended family design to estimate familial risks for multiple sclerosis, and used a twin approach to quantify the contributions of genetic and environmental factors in shaping individual susceptibility to the disease. The(More)
BACKGROUND The fetal and infant life are periods of rapid development, characterized by high susceptibility to exposures. Birth cohorts provide unique opportunities to study early-life exposures in association with child development and health, as well as, with longer follow-up, the early life origin of adult diseases. Piccolipiù is an Italian birth cohort(More)
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