As previously indicated in the section on neutron sources, all clinical studies have ended in Finland, based on a variety of reasons including economic difficulties of the two companies directly involved, VTT and Boneca.
正如前述中子源一节中所指出，所有临床研究均在芬兰进行，但由于直接参与的VTT和博尼卡（Boneca）两家公司出现了经济困难，此项临床研究宣告结束。