1. Department of Histology and EmbryologyPeking University Health Science CenterBeijingChina
2. Department of PathologySchool of Basic Medical SciencePeking University Health Science CenterBeijingChina
3. Keck School of Medicine of University of Southern CaliforniaLos AngelesCaliforniaUSA
4. Department of PathologyState University of New York‐Heath Science Center at BrooklynBrooklynNew YorkUSA