T He Epidermal Growth Factor Receptor (egfr) Family Consists of 4 Related Tyrosine Kinase Receptors, Egfr (erbb1), Erbb2, Erbb3, and Erbb4. Loss of Epidermal Growth Factor Receptor in Vascular Smooth Muscle Cells and Cardiomyocytes Causes Arterial Hypotension and Cardiac Hypertrophy