1	TITLE-ABS-KEY ((acoustic or vestibular or acusticus or auditory or ear) w/1 (schwannoma* or neuroma* or neurinoma* or neurofibroma*))
2	TITLE-ABS-KEY (“acoustic nerve” w/1 (cancer or tumor or tumor))
3	TITLE-ABS-KEY (neurofibromatosis w/1 2)
4	1 or 2 or 3
5	“ki-67”
6	4 and 5
7	INDEX(embase) OR INDEX(medline) OR PMID(0* OR 1* OR 2* OR 3* OR 4* OR 5* OR 6* OR 7* OR 8* OR 9*)
8	6 not 7
9	DOCTYPE(ed) OR DOCTYPE(bk) OR DOCTYPE(er) OR DOCTYPE(no) OR DOCTYPE(sh) OR DOCTYPE(ch)
10	8 not 9
11	LANGUAGE(english)
12	10 and 11