Also, from what I have read, it is usually better, if one is going to be in a trial, to get into a
Phase 3 trial. It is further along. Also, know your options, such as the availability of a rescue arm if the arm you get into is not working.
I did find some information on GS_5816.
http://www.natap.org/2013/EASL/EASL_34.htm
I also found another discussion about this trial (I think it is the same one you are talking about).