SLC12A3 and Hypokalemia: This woman presented with a Gitelman phenotype at the onset but was negative for mutations in SLC12A3. She presents with hypokalemia and hypocalciuria, asthenia, polydipsia, cramps, tingling, abdominal pain, polyuria, heart problems, tetany, hyperpyrexia, gastroesophageal reflux, recurrent proteinuria.