But as Downey points out, year of birth cannot be a causal factor.
On the balance of probabilities, A1 β-casein may be a causal factor.
In a 1988 paper on his research, he wrote, "One is led to the conjecture that magnesium deficiency might be a causal factor in migraine".
The ectopic expression of DUX4 is toxic in muscle tissues and is thought to be a causal factor for FSHD5,6,7,8,9.
It has been suggested that maladaptation of the maternal immune response during pregnancy might be a causal factor for preeclampsia.
The lack of critical reasoning skills may be a causal factor in student attrition from STEM majors.
But an analysis of a number of studies on smoking tobacco and psychosis, published in the Lancet Psychiatry journal, now shows that smoking may be a causal factor in itself.
The trouble with Zimbardo and Coulombe's line of reasoning is that they don't make it clear how, specifically, video game use might be a causal factor in driving any sort of behaviour crisis.
Also, a cytochrome c oxidase (CcO) deficiency has been proposed to be a causal factor in the age-related decline in mitochondrial respiratory activity.
While this association has been noted before, little research has been conducted into whether smoking could actually be a causal factor for psychosis.
In a 30-year prospective study, we tested whether there was evidence that early substance exposure can be a causal factor for adolescents' future lives.
