Table 2. The reported protocols of LI-ESWT in included studies.

ID	Device	Energy density	Frequency	Distribution of energy	Cycle of treatment
1	Omnispec ED1000 (Medispec Ltd., Yehud, Israel / Germantown, MD, USA)	1500 shocks of 0.09mJ/mm2	120 shocks /min	300 shocks were delivered at each of the 5 treatment points (the distal, mid and proximal penile shaft, and to the left and right crura).	Nine-week treatment period: two LI-ESWT sessions per week for 3 weeks, repeated after a 3-week no treatment interval / twice a week for 4 weeks
2	Renova ®(Direx Group LTD)	3600 shocks of 0.09mJ/mm2	a maximum rate of 300 shocks/ min	900 shocks were delivered at each of the 4 treatment points (left and right corpus cavernosum, left and right crus).	One session per week for 4 weeks.
3	Renova ®	5000 shocks of 0.09mJ/mm2	300 shocks/min	900 shocks at left and right corpus cavernosum; 1600 shocks at left and right crus.	One session per week for 4 weeks.
4	Duolith® SD1 ultra (Storz Medical AG, Tägerwilen, Switzerland)	3000 shocks of 0.25mJ/mm2	6Hz	Distal penis (1000 shocks), base of penis (1000 shocks), and corporal bodies on perineum (500 shocks to each crura)	Twice weekly for 6 weeks
5	Duolith® SD1 ultra (Storz Medical AG, Tägerwilen, Switzerland)	3000 shocks of 0.15mJ/mm2	5Hz	Six treatment sites (distal, central and proximal part of each corpus cavernosum)	One session per week for 5 weeks.
6	Duolith® SD1 T-Top (Storz Medical, Tägerwilen, Switzerland)	1000 shocks of 20mJ/mm2, 15mJ/mm2 and 12mJ/mm2	5Hz	Shocks of 20mJ/mm2, 15mJ/mm2, 12mJ/mm2 were applied to the root of penis, to the shaft, and at a few millimeters proximal to the glans, respectively.	Twice sessions every other week for six weeks
7	LGT-2500B(Long Zhi-jie Ltd, Guangzhou, China)	1500 shocks of 1 bar	2Hz	300 shocks were delivered at each of the 5 treatment points (the distal, mid and proximal penile shaft, and the left and right crura).	Twice a week for 4 weeks