Gheun-Ho Kim, Korean nephrologist, educator. Achievements include research in thiazide-sensitive Na-Cl cotransporter and Na-K-2Cl cotransporter type 2, the major sodium transporters in the kidney, were discovered to be regulated by aldosterone and vasopressin, respectively; mechanism of directic tolerance was explained by upregulation of distal renal sodium transporters. Member of American Society Nephrology (correspondent).