The twin and non-twin samples had similar gender profiles, although non-twins tended to be older.
To confirm the above mechanisms, we use twin samples (sample C).
To investigate the etiology of OC symptoms, a meta-analysis was conducted of 37 twin samples from 14 studies, supplemented by a narrative review.
Comparing the twins' samples could show how space radiation and gravity shifts affect astronauts' DNA, metabolism, organ function, and mental health, according to NASA.
This study is based on (repeated) surveys in twin samples from seven countries participating in the GenomEUtwin project: Australia, Denmark, Finland, the Netherlands, Norway, Sweden, and United Kingdom.
To get more insight in the relative contribution of genetic and environmental influences on individual differences in exercise participation, twin samples from seven countries participating in the GenomEUtwin project were used.
Drs. Chiara Sabatti, Ye (Jimmie) Chun, Eleazar Eskin and Caroline van Baal are thanked for helpful discussion on the statistical approaches, Juliaan Meijboom for his help with the analysis and Drs. Ronald Vonk and Astrid van der Schot for collection of the twin samples.
Characteristics of Danish and UK twin samples.
These estimates agree closely with estimates from other twin samples [Keski-Rahkonen et al., 2005].
Across these population-based twin samples, heritability estimates for most common child psychiatric disorders were derived.
