Prior to having this automated system, a project like this one would require personnel to make contact with these patients, to carry-out the consent process, to administer the questionnaires, to follow-up with the participants and to track their status. DADOS accomplishes all of this in a well-organized and efficient manner. Using DADOS, patients are able to self-register, give consent to participate electronically, and complete their questionnaire. The system also sends out email reminders when the next questionnaire is due. All this significantly reduces research-related time, effort, and costs.