“…The included studies consisted of three prospective case series, [9][10][11] one prospective comparative study, 12 and one randomized trial. 13 We excluded 44 studies for the following reasons (Supplementary Table II, online only): case reports, 14 conference abstracts, [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] reviews with overlapping data, [32][33][34][35][36][37][38][39][40][41][42] the use of ClariVein, [43][44][45][46][47][48][49][50][51] overlapping data with an already included report by same author, 52,53 other outcomes, 54 no data reported, 55 and data not yet available.…”