00423nas a2200157   4500000000100000008004100001100001300042700001600055700001600071700002100087700001300108245011000121300001200231490000800243022001400251       2021                            d1 aH. Ahmed1 aH. Whitaker1 aD. Farewell1 aJ. Hippisley-Cox1 aS. Noble00aRespiratory tract infection and risk of bleeding in oral anticoagulant users: self-controlled case series  ae0680370 v375  a0959-8138