The counter-regulatory hormones glucagon , epinephrine , norepinephrine , growth hormone and cortisol were appropriately suppressed when plasma glucose levels were > 4.0 mmol/l ( > 72mg/dl ) , but increased in the albiglutide and placebo groups with glucose levels < 3.3 mmol/l ( < 59.4 mg/dl ) in response to hypoglycaemia .