Bill Toland (22 January 2009). "Health giants halt merger". Pittsburgh Post-Gazette. PG Publishing Co., Inc. Archived from the original on 24 December 2014. Retrieved 18 December 2014.
Bill Toland (22 January 2009). "Health giants halt merger". Pittsburgh Post-Gazette. PG Publishing Co., Inc. Archived from the original on 24 December 2014. Retrieved 18 December 2014.