“…Bartholomew [23] listed 75 terms used over the last 150 years to identify the sources of this condition. Many of them, containing descriptors such as 'psychosis' [35], 'madness' [36], 'psychotic' and 'folie' [37], as well as 'hysteria' [22,27,38], point to an overt psychiatric disorder. In practice, however, there is little evidence that more than a tiny proportion of all cases, if any, are mentally ill [23,26,39].…”