A 67 year old male taxi driver presents with a 3 month history of a white productive cough along with breathlessness on exertion. He states that it started after a particularly bad chest infection. He admits that he smokes 10 cigarettes per day and has done so for 40 years. On examination you note bronchial breath sounds and apical wheezing. Spirometry and Chest x-ray confirm a diagnosis of Chronic Obstructive Pulmonary Disease (COPD). Which of the following management options would you not offer at this time?