HORVITZ: On Thursday, March 3, 2011, Esther E. (Helfand); Of Palm Beach, FL formerly of Squirrel Hill. Beloved wife of the late Robert S. Horvitz. Beloved mother of Mark (Rhonda) Horvitz, David Horvitz and Bruce (Debbie) Horvitz. Sister of Hal (Carol) Helfand. Grandmother of Scott, Jacob, Joey, Rachel, Shana, Sarah, Stacey, Lindsey and Andrew Horvitz. Also survived by many nieces and nephews. Services were held at Ralph Schugar Chapel, Inc. Interment Poale Zedeck Memorial Park Cemetery. Contributions may be made to Poale Zedeck Horvitz Library, 6318 Phillips Avenue, Pittsburgh, PA 15217 or American Cancer Society, 320 Bilmar Drive, Pittsburgh, PA 15205.