Writing on her website, Cornwell, who has studied psychiatry while researching her books, said: "There are misconceptions about psychology, especially when people out there like Tom Cruise say there's no evidence of chemical imbalance and psychiatric disorders. There's going to be some girl or boy who worships this megastar, who decides, 'I'm not going to take my anti-depressants because Tom Cruise said I don't need drugs'."