1. Lightfoot RW, Michel BA, Bloch DA, Hunder GG, Zvaifler NJ, McShane DJ et al (1990) The American College of Rheumatology 1990 criteria for the classification of polyarteritis nodosa. Arthritis Rheum 33:1088–1093
2. Lupoli S, Gargiulo A, Rossi R, Ames PR (2004) Myositis as a presenting feature of polyarteritis nodosa. Clin Exp Rheumatol 22(4):507–508
3. Plumley SG, Rubio R, Alasfar S, Jasin HE (2002) Polyarteritis nodosa presenting as polymyositis. Semin Arthritis Rheum 31(6):377–383
4. Fort JG, Griffin R, Tahmoush A, Abruzzo JL (1994) Muscle involvement in polyarteritis nodosa: report of a patient presenting clinically as polymyositis and review of the literature. J Rheumatol 21(5):945–948
5. Carpenter S, Karpati G (eds) (2001) Ch 2 ‘Methods of tissue removal and preparation’. In: Pathology of skeletal muscle, 2nd edn. Oxford University Press, Oxford, p 8