But recent studies have questioned the connection.
Other studies have questioned Jensen's null sex difference theory.
This feature was once thought to indicate aquatic habits, but recent studies have questioned this conclusion.
Though gold nanoparticles have been considered bio-inert, recent studies have questioned their safety.
Studies have questioned the long-term health effects of offspring conceived after fertility treatments.
However, recently several studies have questioned the protective role of high plasma HDL levels.
But more recent studies have questioned the heart benefits and suggested that the vitamins might interfere with cholesterol-lowering drugs.
In recent years, academic studies have questioned the central premises of Christensen's original "disruptive innovation" theory – that outsiders can produce cheap solutions that can displace existing market leaders.
Empirical studies have questioned the validity of the Faces subtest from the WMS-III for detecting impairment in visual memory, particularly among the elderly.
Nonetheless, neuropsychological, structural and functional studies have questioned such subdivision, suggesting an interwoven organization of the speech function within these cortices.
Recent studies have questioned the original impactor scenario.
