1 Laboratory of Malaria and Vector Research, NIAID/National Institutes of Health, Rockville, MD 20852, USA.
2 Malaria Molecular Epidemiology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia.
3 Laboratory of Malaria and Vector Research, NIAID/National Institutes of Health, Rockville, MD 20852, USA. Electronic address: rfairhurst@niaid.nih.gov.