id	domain	url
ecj-7570	en.wikipedia.org	https://en.wikipedia.org
ecj-7570	emedicine.medscape.com	https://emedicine.medscape.com/article/158064-workup
ecj-7570	www.cardiacep.theclinics.com	https://www.cardiacep.theclinics.com/article/s18779182(14)00058-6/pdf