Marsha: I noted your question on the study in Boulder. I would suggest that this study if it exists would have to have had an IRB protocol completed(Institutional Review Board), which would outline the study in Great detail. Anyone who does human research, Must have an IRB protocol approved prior to doing the study. I would suggest that you call the University in Boulder, find out who the chairman of the IRB is in that community, and then ask for a copy of that protocol. Tom Hale