INS and diabetes mellitus: Exogenous insulin requirement during organ donation could be the result of any combination of the following: (a) endogenous insulin deficiency caused by underlying diabetes (known or unknown); (b) irreversible beta‐cell death; (c) reversible beta‐cell dysfunction caused by short‐term metabolic stressors such as circulating cytokines; and/or (d) insulin resistance caused by inflammation, exogenous glucocorticoids and endogenous hormones such as catecholamines, which are elevated in brain death.