Table 2.

Most frequently used herbs in the included studies.

Most commonly used herbs	Number. of studies	Scientific names
Chuan Xiong	31	(1) Ligusticum chuangxiong Hort.
Bai Zhi	18	(1) Angelica dahurica (Fisch. ex Hoffm.) Benth. et Hook. f. (2) Angelica dahurica (Fisch. ex Hoffm.) Benth. et Hook. f. var. formosana (Boiss) Shan et Yuan
Bai Shao	16	(1) Paeonia lactiflora Pall. (2) Paeonia veitchii Lynch
Gan Cao	13	(1) Glycyrrhiza uralensis Fisch. (2) Glycyrrhiza inflata Bat. (3) Glycyrrhiza glabra L.
Tian Ma	13	(1) Gastrodia elata Bl.
Dang Gui	12	(1) Angelica sinensis (Oliv.) Diels
Chai Hu	11	(1) Bupleurum chinense DC. (2) Bupleurum scorzonerifolium Willd.
Xi Xin	9	(1) Asarum heterotropoides Fr. Schmidt var. mandshuricum (Maxim) Kitag. (2) Asarum sieboldii Miq. var. seoulense Nakai (3) Asarum sieboldii Miq.
Tao Ren	9	(1) Prunus persica (L.) Batsch (2) Prunus davidiana (Carr.) Franch.
Quan Xie	8	(1) Buthus martensii Karsch
Gou Teng	8	(1) Uncaria rhynchophylla (Miq.) Miq. ex Havil.