C. Michael Armstrong Chairman - Board of Trustees, Johns Hopkins Medicine, Health System Corporation and Hospital Form 4 January 22, 2008   January 16, 2007   January 1, 2007   October 1, 2006   July 1, 2006   April 1, 2006   January 17, 2006   January 1, 2006   October 1, 2005   July 1, 2005   April 1, 2005   January 18, 2005   January 1, 2005   October 1, 2004   July 1, 2004   April 1, 2004   January 20, 2004   January 1, 2004   October 1, 2003   July 1, 2003   April 1, 2003