<prompt> Translate the following text to SwahiliIf true regional differences exist, applying the PMMortality C-R function to regions outside the study location could result in mis-estimation of effects in these regions.  <response>: Ikiwa tofauti za kikanda zipo, kutumia kazi ya PM-Mortality C-R kwa mikoa nje ya eneo la utafiti inaweza kusababisha makadirio mabaya ya athari katika mikoa hii. 