32,3,2=1998; 34,4,2=1999; 36,4,Suppl.=2000; 38,4,Suppl.=2001; 40,4,Suppl.=2002; 42,4,Suppl.=2003; 44,4,Suppl.=2004; 46,3,Suppl.=2005; 48,4,Suppl.=2006; 50,3,Suppl.=2007; 52,4,Suppl.=2008; 54,3,Suppl.=2009; 56,3,Suppl.=2010 von: American College of Emergency Physicians: ACEP research forum