===== Magnesium =====

  * GI: Chronic malnutrition/malabsorption, chronic diarrhea
  * Renal: Post-obstructive diuresis, post-ATN
  * Endocrine: Hyper/hypoparathyrordism
  * Redistribution: Hungry bone, acute pancreatitis
  * Other: Uncontrolled DM, chronic alcoholism

===== Phosphorus =====

  * Acute or Chronic renal failure
  * Tumor Lysis Syndrome
  * Re-feeding syndrome
  * Rhabdomyolysis
  * Hyper/hypoparathyroidism
  * DKA
  * Severe lactic acidosis