PT - JOURNAL ARTICLE AU - H. J. Cloft TI - Warning: Side Effects May Include a Decrease in Invasive Procedures AID - 10.3174/ajnr.A2927 DP - 2011 Nov 15 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2011/11/17/ajnr.A2927.short 4100 - http://www.ajnr.org/content/early/2011/11/17/ajnr.A2927.full