1. Institute for Medical Informatics, Section of Medical Informatics, Heidelberg University, Heidelberg, Germany
2. Department of Operations, Postal and Courier Services Regulatory Commission, Accra, Ghana
3. Centro de Informática Médica Telemedicina, Facultad de medicina, Universidad de Chile, Chile
4. Department of Biomedical, Informatics and Medical Education, University of Washington, Seattle, United States