<prompt> Translate the following text to EnglishAmeongeza kuwa mafunzo yanaonyesha matokeo ya mteja na faida ya gharama zinaboreshwa na ufuatiliaji wa utafiti au simu fupi ya ufuatiliaji.  <response>: He added that the literature shows client outcomes and cost-benefits are improved by either research follow-up or a brief monitoring phone call. 