Effect of Soybean Protein on Blood Pressure: A Randomized, Controlled Trial Jiang He, MD, PhD; Dongfeng Gu, MD, MS; Xigui Wu, MD; Jichun Chen, MSc; Xiufang Duan, MD; Jing Chen, MD, MSc; and Paul K. Whelton, MD, MSc ABSTRACT Background: Objective: Design: Setting: Patients: Intervention: Measurements: Results: Limitations: Conclusions: