Approximately half of the patients have endocrine disorders such as diabetes, nutritional disorders such as pellagra or kwashiorkor, or have taken drugs such as guanethidine, thioridazine, or isoprenaline.
Përafërsisht gjysma e pacientëve kanë çrregullime endokrine, si diabeti, çrregullime ushqyese ose kanë marrë drogë si guanethidine, thioridazine, ose isoprenaline.