1. Centre for Oral Clinical Research; Institute of Dentistry; Barts and The London School of Medicine and Dentistry; Queen Mary University London (QMUL); London UK
2. Library Services; UCL Eastman Dental Institute; London UK
3. Graduate Institute of Epidemiology and Preventive Medicine; College of Public Health; National Taiwan University; Taipei Taiwan
4. Department of Oral Biology; University of Pittsburgh School of Dental Medicine; Pittsburgh PA USA