- Differences in idiopathic inflammatory myopathy phenotypes and genotypes between Mesoamerican Mestizos and North American Caucasians: ethnogeographic influences in the genetics and clinical expression of myositis. Shamim, E.A., Rider, L.G., Pandey, J.P., O'Hanlon, T.P., Jara, L.J., Samayoa, E.A., Burgos-Vargas, R., Vazquez-Mellado, J., Alcocer-Varela, J., Salazar-Paramo, M., Kutzbach, A.G., Malley, J.D., Targoff, I.N., Garcia-De la Torre, I., Miller, F.W. Arthritis Rheum. (2002)