A NEW type of traveller dubbed the stem cell tourist is worrying Australian scientists and doctors who say the vulnerable ill are being duped. Australians with debilitating and sometimes terminal diseases are spending tens of thousands of dollars for unproved stem cell treatments in Third World countries. Many, such as Townsville paraplegic Asti Poole, are coming home out of pocket, and extremely let down, after seeing little or no improvement in their conditions. Ms Poole, 28, went to an infertility specialist's clinic in India last year for two months of embryonic stem cell treatment. Four other Australians were also at...