1. The State Key Laboratory Breeding Base of Basic Science of Stomatology, Hubei Province and Key Laboratory of Oral Biomedicine, Ministry of Education (Hubei‐MOST KLOS & KLOBME), School and Hospital of StomatologyWuhan University Wuhan China
2. Restorative Department, College of DentistryUniversity of Illinois at Chicago Chicago IL
3. American Dental Association Foundation, Paffenbarger Research CenterNational Institute of Standards and Technology Gaithersburg MD