#1	(atrial fibrillation OR atrial flutter):ti,ab,kw
#2	MeSH descriptor Anticoagulants explode all trees OR warfarin:ti,ab,kw OR coumadin:ti,ab,kw OR vitamin k:ti,ab,kw OR enoxaparin:ti,ab,kw OR lovenox:ti,ab,kw OR rivaroxaban:ti,ab,kw OR xarelto:ti,ab,kw OR dabigatran:ti,ab,kw OR pradaxa:ti,ab,kw OR heparin:ti,ab,kw OR apixaban:ti,ab,kw OR eliquis:ti,ab,kw OR edoxaban:ti,ab,kw OR lixiana:ti,ab,kw OR anticoagulant:ti,ab,kw OR anticoagulants:ti,ab,kw
#3	MeSH descriptor Intracranial Hemorrhages explode all trees OR MeSH descriptor Hemorrhage explode all trees OR hemorrhage:ti,ab,kw OR hemorrhaging:ti,ab,kw OR bleeding:ti,ab,kw OR bleed:ti,ab,kw OR hemorrhagic:ti,ab,kw OR haemorrhage:ti,ab,kw OR haemorrhaging:ti,ab,kw OR haemorrhagic:ti,ab,kw
#4	MeSH descriptor Time Factors explode all trees OR Resume:ti,ab,kw OR resumed:ti,ab,kw OR restart:ti,ab,kw OR restarted:ti,ab,kw OR restarting:ti,ab,kw OR re-initiate:ti,ab,kw OR reinitiate:ti,ab,kw OR continue:ti,ab,kw OR continued:ti,ab,kw OR start:ti,ab,kw OR resumption:ti,ab,kw OR reinitiating:ti,ab,kw OR resuming:ti,ab,kw OR continuing:ti,ab,kw
#5	#1 AND #2 AND #3 AND #4
#6	#5, Limits: Cochrane Reviews, 2000 to 2012