Values of heart rate (HR, beat/min), mean arterial pressure (MAP, mmHg), heart weight (% body weight), left kidney weight (LKW, % body weight) right kidney weight (RKW, % body weight), body weight on the day of operation (BWO, g) and body weight on the day of experiment day (BWE, g) of sham-operated and left renal artery clipped rats using plexiglass or sliver clips at 4 weeks after sham-operation or renal artery clipping