Standardization of methods to quantify and culture endothelial colony-forming cells derived from peripheral blood Position paper from the International Society on Thrombosis and Haemostasis SSC - Smadja,DM; Melero-Martin,JM; Eikenboom,J; Bowman,M; Sabatier,F; Randi,AM (JOURNAL OF THROMBOSIS AND HAEMOSTASIS, 2019)