Facebook's apparent outage is the second the website has suffered this summer, with an other breakdown in the service in June.
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The social site has been overhauling many of its policies in recent weeks following repeated criticism over how it handles abusive content.
Niraparib is a PARP inhibitor belonging to a new class of drugs that target cancers with defective DNA repair systems.
According to the EU, during the transition period the UK would have to comply with the bloc's trade policy.