[1] Vanderbilt Univ Sch Med, Dept Pathol Microbiol & Immunol, Nashville, TN USA
[2] Temple Univ, Lewis Katz Sch Med, Dept Obstet & Gynecol, Philadelphia, PA USA
[3] Temple Univ, Lewis Katz Sch Med, Dept Pathol & Lab Med, Philadelphia, PA USA
[4] 3401 N Broad St Rm B351, Philadelphia, PA 19140 USA