Angiopoietin 1 Receptor (Endothelial Tyrosine Kinase or Tunica Interna Endothelial Cell Kinase or Tyrosine Kinase With Ig And EGF Homology Domains 2 or Tyrosine Protein Kinase Receptor TEK or Tyrosine Protein Kinase Receptor TIE 2 or p140 TEK or CD20