<prompt> Translate the following text to EnglishDhana hii imeonyeshwa kuwa ya busara ikiwa mabadiliko katika hatari inayohesabiwa iko ndani ya safu ya hatari zilizokadiriwa katika masomo ya msingi Rowlatt et al.  <response>: This assumption has been shown to be reasonable provided the change in the risk being valued is within the range of risks evaluated in the underlying studies Rowlatt et al. 