english: To do reliable research on any condition, scientists must agree on the specific characteristics that make up that condition so they're all talking about the same thing, and with PMS, this has not been the case.
non_english: Da bi obavili pouzdano istraživanje o bilo kom stanju, naučnici se moraju složiti oko specifičnih karakteristika koje sačinjavaju to stanje tako da svi govore o istoj stvari, što nije bio slučaj sa PMS-om.