Search terms	Results
1	risk factor: ti, ab, kw	30,850
2	MeSH descriptor: [Risk Factors] explode all trees	26,223
3	anemia or anaemia: ti, ab, kw	15,310
4	MeSH descriptor: [Anemia] explode all trees	4907
5	Bleed*: ti, ab, kw	29,905
6	MeSH descriptor: [Hemorrhage] explode all trees	13,809
7	hemorrhage: ti, ab, kw	21,154
8	blood loss: ti, ab, kw	21,729
9	MeSH descriptor: [Postoperative Hemorrhage] explode all trees	1238
10	MeSH descriptor: [Blood Loss, Surgical] explode all trees	2660
11	postoperative complication: ti, ab, kw	18,449
12	MeSH descriptor: [Postoperative Complications] explode all trees	37,882
13	#1 or #2	52,679
14	#2 or #3 or #4 or #5 or #6 or #7 or #8 or #9 or #10 or #11 or #12	138,403
15	laparoscopy: ti, ab, kw	7205
16	MeSH descriptor: [Laparoscopy] explode all trees	6421
17	minimally invasive procedure: ti, ab, kw	1809
18	MeSH descriptor: [Uterine Myomectomy] explode all trees	53
19	myomectomy: ti, ab, kw	552
20	#15 or #16 or #17	10,031
21	#18 or #19	552
22	#21 and #20	156
23	#22 and #13 and #14	4