Thank you very much Jane for your very useful information. I did not want your doctor friend to know we were buddies in case I needed his expert medical advice. I guess now the cat is out of the bag and I have to keep using my reliable voodoo doctor.If I get back alive from this vacation it will be a minor miracle. A 51 year old horseback riding with very fit teenagers, Ian Anderson's cave tube, and my first scuba dive. Man I should get my f---ing head examined! Ohhhh, these old fragile bones....I need the good doctor.