Russ, sorry for bringing too much details about the scientific topics. My initial comment on Nhu's suggestion was not properly understood and some members reacted either as if an attack or as if I missed the point. Therefore, I needed to explain why I think it was not going to bring me any additional information unless it is part of bigger research. I hope that people won't be shy to ask questions if anything unclear though. *Dr. Christian M. Lachaud, PhD* _________________ http://www.saffron-crocuses.com/