In the top right corner of each tweet in your feed is now a little arrow to click, which expands the profile of the person who sent the tweet over your own existing profile on the right.

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The new law is not expected to be retroactive - meaning that high-profile existing cases will continue.

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If you do not have any friends that would be interested in recommending good reads do not worry, there are plenty of recommendations from existing site users available on your profile page.

BBC: NEWS | Programmes | Click | Webscape

"It's reasonable to think that the safety profile is going to be significantly different from any of the existing medicines, " Richardson says.

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