graph LR A[Metabolic] --> B[Cancer] & C[Chronic Organ Disease] & D[Infection] & E[Endocrinopathy] & F[Neurologic Illness] & G[Medications] C --> H((Cardiovascular Disease <br>Respiratory Disease<br>Renal dysfunction<br>CTD)) E --> I((Hyperthyroidism<br>DM<br>Adrenal insufficiency<br>Pheochromocytoma))

graph LR B(Intake) D(Gastrointestinal) --> E(Malabsorption) F(Psychiatric/Primary) B --> D & E & F