1. Museo de Arqueologı́a, Centro Cultural de la Universidad Nacional Mayor de San Marcos, Avenida Nicolás de Piérola 1222, Lima 1, Peru.
2. Department of Anthropology, The Field Museum, 1400 South Lakeshore Drive, Chicago, IL 60187, USA.
3. Department of Anthropology, Northern Illinois University, DeKalb, IL 60115, USA.