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"we were quite surprised to find there were no significant differences," says study author.
.labour�s new study is based on freedom of information data from 95 english nhs trust (file pic)./www.belfasttelegraph.co.uk/news/northern-ireland/article36918586.ece/6063c/autocrop/h342/2018-05-18_new_41038410_i2.jpg.