<prompt> Answer this question truthfullyCould you provide a more thorough description of what you would like me to rephrase for you? This sentence already appears to be in proper English.  <response>: <reason> FrequencyThe incidence of GSD type IV is approximately 0.13 to 0.17 per 100,000 individuals worldwide. GenderGSD type IV affects men and women equally. RaceAdult polyglucosan body disease usually affects individuals of the Ashkenazi Jewish population. Familial aggregation is observed in about 30 of cases. 