Which of the following does not cause hyperventilation
CAUSES OF HYPERVENTILATION:
1. Hypoxemia
a. High altitude
b. Pulmonary disease
c. Cardiac shunts
2. Pulmonary disorders
a. Pneumonia
b. Interstitial pneumonitis, fibrosis, edema
c. Pulmonary emboli, vascular disease
d. Bronchial asthma
e. Pneumothorax
f. Chest wall disorders
3. Cardiovascular disorders 
a. Congestive heart failure
b. Hypotension
4. Metabolic disorders
a. Acidosis (diabetic, renal, lactic)
b. Hepatic failure
5. Neurologic and psychogenic disorders
a. Psychogenic or anxiety hyperventilation
b. Central nervous system infection, tumours
6. Drug-induced 
a. Salicylates
b. Methylxanthine derivatives
c. Adrenergic agonists
d. Progesterone
7. Miscellaneous
a. Fever, sepsis
b. Pain c. Pregnancy
Anxiety
High altitude
Pulmonary hypertension
Psychotic illness