1. Department of Dermatology; Westmead Hospital; Westmead NSW 2145 Australia
2. Department of Entomology; Rutgers University; 96 Lipman Drive New Brunswick NJ 08901-8525 USA
3. Department of Medical Entomology, Pathology West-ICPMR; Westmead Hospital; Locked Bag 9001 Westmead NSW 2145 Australia