Fig2B-right [doi:10.1038/ni1013] Karkkainen MJ; Haiko P; Sainio K; Partanen J; Taipale J; Petrova TV; Jeltsch M; Jackson DG; Talikka M; Rauvala H; Betsholtz C; Alitalo K "Vascular endothelial growth factor C is required for sprouting of the first lymphatic vessels from embryonic veins." 2004 Nat Immunol 5(1):74-80 [PMID:14634646] © Nature Publishing Group. Reproduced with permission from Nat Immunol.