Twenty four hour urine samples were collected for measuring daily excretions of calcium, oxalate, cirtate, inorganic phosphates and creatinine.

• 每日记录饲料量、饮水量，并收集24小时尿液，测量尿量，酸碱值，钜，磷，草酸，柠檬酸，肌氨酸酐。