<prompt> Translate the following text to SwahiliAs discussed earlier, EPAs Science Advisory Board, while acknowledging the uncertainties in estimation of a PM-mortality relationship, has repeatedly recommended the use of a study that  <response>: Kama ilivyoelezwa hapo awali, Baraza la Ushauri la Sayansi la EPA, wakati wa kutambua kutokuwa na uhakika katika makadirio ya uhusiano wa PM-kifo, mara kwa mara imependekeza matumizi ya utafiti ambao 