Characteristic	Intervention(s) and comparator(s)	Deaths [N]	Deaths [%]	All adverse events [N]	All adverse events [%]	Severe/serious adverse events [N]	Severe/serious adverse events [%]
Ludvik 2002	I1: sweet potato (Caiapo) tablets 2 g	0	0	"No adverse events have been reported by the patients"	‐	‐	‐
	I2: sweet potato (Caiapo) tablets 4 g	0	0
	C: placebo	0	0
Ludvik 2004	I: sweet potato (Caiapo) tablets 4 g	0	0	16/30	53.3	‐	‐
	C: placebo	0	0	14/31	45.2	‐	‐
Ludvik 2008	I: sweet potato (Caiapo) tablets 4 g	0	0	‐	‐	‐	‐
	C: placebo	0	0	‐	‐	‐	‐
Footnotes "‐" denotes not reported C: comparator; I: intervention