> There is not single cure for personality disorders (/) NPD (…) I presume this is because the classification of these disorders is way to broad and unspecific

> There is not single cure for personality disorders (/) NPD (…) I presume this is because the classification of these disorders is way to broad and unspecific as opposed to hard science diagnostics. > (…) through talk therapy generally under two years Would you have a good source for that e.g. a meta study?