I have not heard of this BUT that does not mean it does not exists..google the info you have and see what you come up with or check Alzinfo.com
Sorry Rona I couldnt be more help.I would love to know about
this myself so I will do some checking as well .......also you could check out resources ( other) on HW in yellow at the side
I will get back to you if I find anything out
Maybe someone has heard of this and will post.....