AU - Liu H, Waxman DA, Main R, Mattke S TI - UTilization of anesthesia services during outpatient endoscopies and colonoscopies and associated spending in 2003-2009 PT - JOUR DP - 2012 TA - JAMA pages = {1178-1184}, VI - 307 IP - 11 AID - 10.1001/jama.2012.270 [doi] 4100 - http://dx.doi.org/10.1001/jama.2012.270 SO - JAMA March 21, 2012 307(11):1178