Walther EU, Hohlfeld R (November 1999). "Multiple sclerosis: side effects of interferon beta therapy and their management". Neurology. 53 (8): 1622–7. doi:10.1212/wnl.53.8.1622. PMID10563602.
Eccles R (November 2005). "Understanding the symptoms of the common cold and influenza". The Lancet. Infectious Diseases. 5 (11): 718–25. doi:10.1016/S1473-3099(05)70270-X. PMID16253889.
Walther EU, Hohlfeld R (November 1999). "Multiple sclerosis: side effects of interferon beta therapy and their management". Neurology. 53 (8): 1622–7. doi:10.1212/wnl.53.8.1622. PMID10563602.
Eccles R (November 2005). "Understanding the symptoms of the common cold and influenza". The Lancet. Infectious Diseases. 5 (11): 718–25. doi:10.1016/S1473-3099(05)70270-X. PMID16253889.