1. Department of Biological Sciences, Faculty of ScienceNational University of Singapore Singapore 117543
2. Department of PathologyWest China Hospital, Sichuan University Chengdu China 610041
3. Fundação Oswaldo Cruz‐CearáRua São José, 2° Pavimento, Precabura Eusébio 61760‐000 Brazil
4. National Research Council of Canada Canada