1. Dental Research Center (DRC) and Tissue Engineering and Biomaterials Research Unit (TEBRU); Qassim College of Dentistry; Qassim University; Buraidah Saudi Arabia
2. Laboratory for Immunoregulation and Tissue Engineering (LITE); Ostrow School of Dentistry; University of Southern California; Los Angeles CA USA
3. College of Dental Medicine; Columbia University; New York NY USA