PorterIABrodieJ. Boric acid preservation of urine samples. BMJ1969; ii: 353–5.
2.
Intersalt Cooperative Research Group. Intersalt Study. J Hypertension1986; 4: 781–7.
3.
BinghamSAGoldbergGRCowardWAPrenticeAMCummingsJH. The effect of exercise and improved physical fitness on BMR. Br J Nutr1989; 61: 155–73.
4.
TiffanyTOJansenJMBurtisCAOvertonJBScottCD. Enzymatic kinetic rate and endpoint analyses of substrate, by use of a Gemsaec fast analyser. Clin Chem1972; 18: 829–40.
5.
MarshWHFingerhutBMillerH. Automated and manual direct methods for the determination of blood urea. Clin Chem1965; 11: 624–7.
6.
FawcettJKScottJE. A rapid and precise method for the determination of urea. J Clin Pathol1960; 13: 156–9.