Now, Swedish and American researchers have discovered that a specific protein plays a major role.
The Swedish researchers reported their findings after investigating complaints about skin rash from 150 people who used computers at work.
In the 1990s, a team of Swedish researchers interviewed nearly 1,300 patients about to undergo coronary artery bypass surgery.
Over the past few decades, Swedish researchers have been developing and applying new concepts for caries risk assessment.
Swedish researchers then developed the permanent, implanted pacemakers that are widely used today.
How wrong that is, Swedish researchers have discovered.
A second study with similar results is reported by Swedish researchers.
The Swedish researchers, writing in the journal Nature, have described a new way of making a lens that has straight surfaces.
Swedish researchers followed more than 61,000 women from 1987 to 2004.