I am a little confused about this study you talked about. Since some participants took placebos, that is a type of control group. Do you also want a control group of people who took nothing? Where there any other measures taken besides self report questionnaires? How often were these questionnaires administered? Oh, and do you happen to know if the doctors were blind to the conditions or was it just the participants?
Maybe even easier . . . do you have the citation to this study? I wonder if there have been any replications.
I hear dribose is expensive. Wait, I think someone said that already in response to my query. I keep meaning to get malic acid, but I think it has to be gotten from a specialty store because I cannot find it at a regular store.