Table 1.

Database search strategy

Subject term keywords	1. Exp. Extra corporeal shock wave therapy
	2. “Extra corporeal shock wave therapy” or ESWT or “shock wave therapy” or lithotripsy
	3. 1 or 2
Subject term keywords	4. Exp. ulcer
	5. Lower limb or foot* or leg or arterial or venous or neuropathic or diabet*
	6. 4 or 5
Combine	10. 3 and 6