I'm going to Yale at the end of this month for SPECT scan #4 as part of a clinical trial. This may be the last one - 4 scans over the past years: 2003-2005-2007-2009 This SPECT scan trial started in conjunction with the first trial I joined in 2003 - shortly after my diagnosis.
For pwp interested in learning all about clinical trials and the process, I recommend you look into PDF's clinical research learning institute. Tomorow - July 17 - is the deadline for applications!!
http://www.pdf.org/en/crli