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| By | Healthwise Staff |
| Primary Medical Reviewer | Kathleen Romito, MD - Family Medicine |
| Specialist Medical Reviewer | Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology |
| Last Revised | July 7, 2010 |
| By: | Healthwise Staff | Last Revised: July 7, 2010 |
| Medical Review: | Kathleen Romito, MD - Family Medicine Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology | |
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