id	domain	url
ihlr-18890	perma.cc	http://perma.cc/uyv7-hs7n
ihlr-18890	content.healthaffairs.org	http://content.healthaffairs.org/content/27/4
ihlr-18890	perma.cc	http://perma.cc/7cw9-ywfr
ihlr-18890	www.nytimes.com	http://www.nytimes.com/2005/03/28/world/americas/28iht-choice.html?_r=0
ihlr-18890	perma.cc	http://perma.cc/7wqn-ladz
ihlr-18890	articles.chicagotribune.com	http://articles.chicagotribune.com/1997-09-07/business
ihlr-18890	perma.cc	http://perma.cc/s6hktdl9