1) West ML, Marsden PA, Halperin ML, et al. New clinical approach to evaluate disorders of potassium excretion. Mineral Electrolyte Metab. 12: 234-238, 1986.
2) West ML, Bend O, Halperin ML., et al. Development of a test to evaluate the transtubular potassium concentration gradient in the cortical collecting duct in vivo. Miner Electrolyte Metab. 12: 226-233, 1986.
3) Kamel KS, Ethier JH, Richardson RMA, Bear RA, Halperin ML. Urine electrolytes and osmolality: When and how to use them. Am J Nephrol 10: 89-102, 1990.
4) Chacko M, Fordtran JS, Emmett M. Effect of mineralocorticoid activity on transtubular potassium gradient, urinary [K]/[Na] ratio, and fractional excretion of potassium.
5) Rodriguez-Soriano J, Ubetagoyena M, Vallo A. Transtubular potassium concentration gradient: a useful test to estimate renal aldosterone bio-activity in infants and children. Pediatr Nephrol. 4: 105-110, 1990.