1. Division of Evolution, Ecology and Genetics; Research School of Biology; The Australian National University; 116 Daley Road Acton ACT 2601 Australia
2. Rodent Laboratory; Indonesian Centre for Rice Research; Jl. Raya 9 Sukamandi Subang West Java 41256 Indonesia
3. Department of Gastroenterology and Hepatology; The Canberra Hospital; Woden ACT 2607 Australia
4. Medical School; The Australian National University; Acton ACT 2600 Australia