Later groups like Wara , Khanata , Grupo Aymara , Paja Brava and , most especially , Los K'jarkas ( of Cochabamba ) , helped further refine this fusion .
Later groups like Wara , Khanata , Paja Brava . 
 Savia Andina and , most especially , Los K'jarkas ( of Cochabamba ) , helped further refine this fusion .