Table 1: Search strategies.

Embase
1cryoablation/(4285)
2cryoballoon.mp. (1009)
3cryoballoon.mp. (99)
4Cryosurgery/(10,075)
5cryosurg.mp. (11,090)
6cryoablat.mp. (5709)
7or/1-6 (16,355)
8radiofrequency ablation/(21,784)
9catheter ablation/(25,682)
10(radiofrequency adj2 ablat).mp. (31,386)
11(catheter adj2 ablat).mp. (29,066)
12(electric adj2 ablat∗).mp. (55)
13or/8–12 (49,731)
14atrial fibrillation/(12,529)
15afib.mp. (668)
16auricular fib.mp. (1107)
17atrial fib.mp. (85,496)
18or/14-17 (86,631)
197 and 13 and 18 (966)
20remove duplicates from 19 (945)
21random.mp. (1250,429)
22randomized controlled trial/(403,270)
23randomization/(70,306)
24exp “clinical trial (topic)”/(192,249)
25clinical trial.mp. (1213,928)
26single blind procedure/(22,062)
27double blind procedure/(130,675)
28((singl or doubl or tripl or trebl) adj3 (blind or mask)).mp. (239,618)
29experimental trial.mp. (2390)
30or/21–29 (2054,944)
3120 and 30 (174)

Medline
1Cryoballoon.mp. (375)
2Cryosurgery/(11,490)
3cryosurg.mp. (12,315)
4cryoballoon.mp. (10)
5Cryoablation.mp. (2508)
6or/1–5 (13,174)
7Catheter Ablation/(24,682)
8(radiofrequency adj2 ablat).mp. (13,686)
9(electric adj2 ablat).mp. (244)
10(catheter adj2 ablat).mp. (27,099)
11or/7–10 (30,238)
12Atrial Fibrillation/(40,331)
13AFIB.mp. (181)
14atrial fib.mp. (57,253)
15auricular fib.mp. (1555)
16or/12-15 (57,440)
176 and 11 and 16 (446)
18remove duplicates from 17 (441)
19randomized controlled trial/(416,221)
20Randomized Controlled Trials as Topic/(103,492)
21Random Allocation/(86,790)
22controlled clinical trial/(90,701)
23experimental trial.mp. (2040)
24Single-Blind Method/(21,827)
25Double-Blind Method/(135,430)
26((singl or doubl or tripl or trebl) adj3 (blind or mask)).mp. (196,284)
27randomized controlled trial.pt. (416,221)
28clinical trial.pt. (500,017)
29rct.mp. (26,020)
30random.mp. (1028,478)
31exp clinical trial/(737,112)
32clinical trial.mp. (852,720)
33exp Clinical Trials as Topic/(292,379)
34or/19–33 (1567,877)
3518 and 34 (73)