PT - JOURNAL ARTICLE AU - Mark C. Norris TI - Dueling Guidelines AID - 10.1097/AAP.0000000000000358 DP - 2016 Mar 01 TA - Regional Anesthesia & Pain Medicine PG - 291--291 VI - 41 IP - 2 4099 - http://rapm.bmj.com/content/41/2/291.1.short 4100 - http://rapm.bmj.com/content/41/2/291.1.full SO - Reg Anesth Pain Med2016 Mar 01; 41