Electrocardiography / Humans / Female / Potassium / Clinical Sciences / Quadriplegia / Middle Aged / Hypokalemia / Adult / Congenital Adrenal Hyperplasia / Public health systems and services research / Neuromuscular diseases / Intensive Care Medicine / Metabolic Disorder / Quadriplegia / Middle Aged / Hypokalemia / Adult / Congenital Adrenal Hyperplasia / Public health systems and services research / Neuromuscular diseases / Intensive Care Medicine / Metabolic Disorder