1. Visit-to-visit and 24-h blood pressure variability: association with endothelial and smooth muscle function in African Americans Diaz, Keith; Veerabhadrappa, P.; Kashem, M. A.; Thakkar, S. R.; Feairheller, D. L.; Sturgeon, K. M.; Ling, C.; Williamson, S. T.; Kretzschmar, J.; Lee, H.; Grimm, H.; Babbit, D. M.; Vin, C.; Fan, X.; Crabbe, D. L.; Brown, M. D. 2013 Articles Vascular smooth muscleAfrican AmericansAmbulatory blood pressure monitoringBlood pressureMedicine