2Li S K,Cui D A,Wang S Y,et al. Efficacy of an herb al granule as treatment option for neonatal Tibetan lamb diarrhea under field conditions [J]. Livestock Science ,2015,172:79-84.
3Gallagher J C, Seligson D. Significance of abnormally low blood urea levels [J]. N Engl J Med, 1962, 266(8) :492-495.
4Gifford L,Susana L K. Significance of low serum urea nitrogen concentration[J]. Clin Chezn, 1989,35 (4) : 639-640.
5Rafael J, Holly M. The decreased serum urea nitro- gen-creatinine ratio [J]. Arch Intern Med, 1998, 158(22) :2509-2511.
6Sinkeler S J,Visser F W,Krikken J A,et al. Higher body mass index is associated with higher fractional creatinine excretion in healthy subjects[J]. Nephrol Dial Transplant, 2011,26 (10) : 3181-3188.
7Branten A J, Vervoort G,Wetzels J F. Serum creatinine is a poor marker of GFR in nephrotic syndrome[J]. Neph- rol Dial Transplant ,2005,20(4) :707-711.
