id	domain	url
gra-2170	content.wkhealth.com	http://content.wkhealth.com/linkback/openurl?sid=wkptlp
gra-2170	www.thelancet.com	http://www.thelancet.com/article/s0140673605177411/fulltext
gra-2170	dx.doi.org	http://dx.doi.org/10.1038/hr.2011.105