Since July 2012, it has been possible to pick out a Creative Commons attribution license as the default, making it possible for other users to reuse and remix the content. Blaskewicz CD, Pudney J, Anderson DJ (July 2011). "Structure and function of intercellular junctions in human cervical and vaginal mucosal epithelia". A TiVo service update in July 2008 allowed the technique to lookup and participate in YouTube video clips.