Roger van Zandvoort

At twenty he went to the Nederlandse Akademie voor Natuurgeneeskunde (Natural Medicine) in Hilversum, Netherlands. After finishing, he was immediately invited to start lecturing there because of the deep knowledge of phytotherapy he'd acquired both before and during his studies.

In 1982, he started to work on additions and corrections to Kent's Repertory, with no initial intent to publish but simply to benefit his patients. Gradually, however, he began spending less time in the clinic and more time in his study, engrossed in work on the repertory. From these efforts sprang a database called the "Complete Repertory", first used commercially in combination with MacRepertory by Kent Homeopathic Associates, later with CARA and now with many other software producers.

In 1990, with the guidance of colleagues, including many medical doctors from Germany, Austria and Switzerland, he started to integrate the Boger and Boenninghausen information into the Complete Repertory. Over a six-year period he received and integrated their work into his Repertory.

Now, after twenty years of work, consistently updating and improving the Complete Repertory, he still works full time on this project, now called Repertorium Universale which includes the classic works from Germany and the United States that have never been used, like Noak and Trinks, Possart, the provings from German magazines, articles in the old American journals and, most importantly, the handwritten additions that Boenninghausen made in his last two repertories which were made based on clinical confirmations from his practice.