<prompt> Translate the following text to SwahiliThe doubters also argue that these laboratory studies, which usually run from two to four years, may just be seeing a short-term effect.  <response>: Hata hivyo, watafiti wanasema kwamba utafiti huo wa maabara, ambao kwa kawaida huchukua miaka miwili hadi minne, unaweza kuwa na matokeo ya muda mfupi tu. 