Professional Original Effective Date: October 26, 2010 Institutional Original Effective Date: November 29, 2010 Revision Date(s): May 20, 2011; February 14, 2012; February 24, 2012; January 15, 2013; March 19, 2013 Revision Date(s): May 20, 2011; February 14, 2012; February 24, 2012; January 15, 2013; March 19, 2013 Current Effective Date: October 26, 2010 Current Effective Date: November 29, 2010

Article history: Received 20 August 2013 Received in revised form 5 January 2015 Accepted 9 January 2015 Available online 11 March 2015

Article history: Received 22 October 2013 Received in revised form 14 January 2014 Accepted 20 January 2014 Available online 1 March 2014

Article history: School shootings have alter Received 4 December 2007 Received in revised form 17 December 2008 Accepted 20 January 2009 Available online 24 January 2009

Article history: Received 20 November 2013 Received in revised form 24 January 2014 Accepted 29 January 2014 Available online 25 February 2014

Article history: Received 30 July 2014 Received in revised form 20 November 2014 Accepted 12 January 2015 Available online 22 January 2015

Article history: Bacterial cellulose (BC) is Received 18 August 2008 Received in revised form 28 December 2008 Accepted 6 January 2009 Available online 20 January 2009

Article history: Received 28 July 2013 Received in revised form 20 December 2013 Accepted 22 January 2014 Available online 24 January 2014

Article history: Received 9 July 2009 Received in revised form 20 January 2010 Accepted 25 January 2010 Available online 1 February 2010