Would you like a receipt? <a href="http://www.greenweclean.com/index.php/stmap_717spwm.html?viagra.glyset.antivert.gemfibrozil" rel="nofollow">doxepin sleep maintenance</a>  Twitter made its IPO registration documents public late Thursday, setting the stage for the most closely watched initial public offering since Facebook's in 2012. Rizvi Traverse is listed as one of the institutional shareholders with at least a 5 percent ownership stake, but no further details were disclosed.