[1] Thomas Jefferson Univ, Wills Eye Hosp, Mid Atlantic Retina, 840 Walnut St,Suite 1020, Philadelphia, PA 19107 USA
[2] VitreoRetinal Surg, Minneapolis, MN USA
[3] Oakland Univ, William Beaumont Sch Med, Associated Retinal Consultants, Royal Oak, MI USA
[4] Retina Ctr, Minneapolis, MN USA
[5] Retina Inst, St Louis, MO USA
[6] Harvard Med Sch, Massachusetts Eye & Ear, Boston, MA 02115 USA