#10	#9 AND #8 AND #7
#9	TS=(traumatology OR non‐operative OR nonoperative or nonsurg* or non‐surg*)
#8	TS=(blunt or non‐penetrating or nonpenetrating) AND TS=(injur* or wound* or trauma*)
#7	TS=liver or TS=hepatic
#6	#5 AND #4
#5	TS=(human*)
#4	#3 OR #2 OR #1
#3	TS=((singl* OR doubl* OR trebl* OR tripl*) SAME (blind* OR mask*))
#2	TS=(controlled clinical trial OR controlled trial OR clinical trial OR placebo)
#1	TS=(randomised OR randomized OR randomly OR random order OR random sequence OR random allocation OR randomly allocated OR at random OR randomized controlled trial)