Affiliation: | 1. Infectious Diseases Department, Middlemore Hospital, Auckland, New Zealand;2. Infectious Diseases Department, Auckland City Hospital, Auckland, New Zealand;3. Auckland Regional Public Health Service, Auckland, New Zealand;4. Environmental Science and Research, Christchurch, New Zealand;5. Medicine, North Shore Hospital, Auckland, New Zealand;6. Department of Paediatrics, Waitakere Hospital, Auckland, New Zealand |