This database is made up of people who attend short courses on topics considered as part of the field of natural medicine. They vary in the degree with which they are involved in this field. Some are practitioners who want to keep abreast of the latest findings of their fellow practitioners. Some are beginners or learners in the field, who need further training. Some are just simply curious. The courses may last for a few days, or for a couple of weeks. The lecturers are individuals who have authored books and reference materials on various subjects of the field (and who take advantage of the seminar event to sell their latest books at the venue).