The U.S. National Institutes of Health hosts Clinical Trials which lists all of the open trials for various conditions. I was surprised to see the number of trials available for amputees. I believe there are 38 studies, most of which are recruiting participants. If you are interested in any of these trials, please follow the information on the site to learn more. One of my favorites is a trial on Mirror Therapy for Phantom Limb Pain. I have seen this used with an upper extremity amputee with great success. I have recently recommended this therapy for a below knee amputee (BKA). There are two separate trials for mirror therapy; one of which is home/self based. To access the trials click here.