Ghostwriting has become widespread in such areas of medicine as cardiology and psychiatry, where drugs play a major role in treatment. Senior doctors, inevitably very busy, have become willing to "author" papers endorsing new medicines that have been written by ghostwriters paid by drug companies. Large amounts of money may be exchanged. Originally, ghostwriting was confined to medical journal supplements sponsored by the industry, but it can now be found in all the major journals in relevant fields. In some cases, it is alleged, the scientists named as authors will not have seen the raw data they are writing about – just tables compiled by company employees. It has been estimated that 50% of the articles on drugs in the major journals across all areas of medicine are not written in a way that the average person in the street expects them to be authored.