Too bad this is just five "clusters" of characteristics that people with not-type-I diabetes can be grouped into. No clear underlying mechanism for the cause of

Too bad this is just five "clusters" of characteristics that people with not-type-I diabetes can be grouped into. No clear underlying mechanism for the cause of each of the groups diabetes. Maybe more in the journal paper? Or now focused studies can be done on each group to find out the root cause? I hope so.